Crown Castle NG East LLC v. PUC, Aplt. ( 2020 )


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  •                                     [J-81-2019]
    IN THE SUPREME COURT OF PENNSYLVANIA
    MIDDLE DISTRICT
    SAYLOR, C.J., BAER, TODD, DONOHUE, DOUGHERTY, WECHT, MUNDY, JJ.
    CROWN CASTLE NG EAST LLC AND               :   No. 2 MAP 2019
    PENNSYLVANIA-CLE LLC,                      :
    :   Appeal from the Order of the
    Appellees                :   Commonwealth Court dated June 7,
    :   2018 at No. 697 CD 2017 Reversing
    :   the Order of the Pennsylvania Public
    v.                             :   Utility Commission dated May 4, 2017
    :   at No. M-2016-2517831.
    :
    PENNSYLVANIA PUBLIC UTILITY                :   ARGUED: October 15, 2019
    COMMISSION,                                :
    :
    Appellant                :
    OPINION
    JUSTICE MUNDY                                                 DECIDED: July 21, 2020
    In this appeal by allowance, we consider the level of deference courts must afford
    an administrative agency’s interpretation of its enabling statute. We conclude that an
    agency’s interpretation of a clear and unambiguous statute is not entitled to deference.
    Additionally, we consider whether the Commonwealth Court erred in concluding that
    Distributed Antenna System (DAS) networks are public utilities under the Pennsylvania
    Public Utility Code (Code),1 thereby reversing the Pennsylvania Public Utility
    Commission’s (PUC) interpretation of the definition of “public utility.” For the following
    reasons, we affirm the judgment of the Commonwealth Court.
    1   66 Pa.C.S. §§ 101-3316.
    This case involves the status of DAS networks as public utilities in Pennsylvania.
    Appellees, Crown Castle NG East LLC (Crown Castle NG) and Pennsylvania-CLEC LLC
    (Pennsylvania-CLEC) (collectively Crown Castle), operate DAS networks.              Crown
    Castle’s DAS networks provide telecommunications transport services to Wireless
    Service Providers (WSP), such as AT&T Wireless, Verizon Wireless, T-Mobile, and
    others. The WSPs offer “commercial mobile radio service” (CMRS) to retail end-users.2
    2CMRS is a term of art in connection with the Federal Communications Act, 47 U.S.C.
    §§ 151-624. The Federal Communications Commission regulations define CMRS as:
    A mobile service that is: (a)(1) provided for profit, i.e., with the
    intent of receiving compensation or monetary gain;
    (2) An interconnected service; and
    (3) Available to the public, or to such classes of eligible
    users as to be effectively available to a substantial
    portion of the public; or
    (b) The functional equivalent of such a mobile service
    described in paragraph (a) of this definition.
    (c) A variety of factors may be evaluated to make a
    determination whether the mobile service in question is the
    functional equivalent of a commercial mobile radio service,
    including: Consumer demand for the service to determine
    whether the service is closely substitutable for a commercial
    mobile radio service; whether changes in price for the service
    under examination, or for the comparable commercial mobile
    radio service, would prompt customers to change from one
    service to the other; and market research information
    identifying the targeted market for the service under review.
    (d) Unlicensed radio frequency devices under part 15 of this
    chapter are excluded from this definition of Commercial
    mobile radio service.
    47 C.F.R. § 20.3. Although the term CMRS is not used in the Code, the PUC considers
    CMRS as synonymous with the Code’s term “mobile domestic cellular radio
    telecommunications service.” PUC Order, Review of Issues Relating to Comm’n
    Certification of Distributed Antennae Sys. Providers in Pa., M-2016-2517831, 2/23/16, at
    3 n.4.
    [J-81-2019] - 2
    A DAS network transports the wireless traffic of its WSP customers, consisting of voice,
    data, and video traffic generated by a consumer’s mobile device (smartphone), over
    terrestrial fiber optic lines between “nodes” and “hubs.” The nodes are located on utility,
    streetlight, or traffic poles in public rights-of-way. They are comprised of small, low power
    antennae that receive radio frequency (RF) signals and additional equipment that
    converts the RF signals to optical signals. The optical signals are then transported over
    the DAS provider’s fiber optic lines to a WSP’s central hub, which is typically housed in a
    building on private property, where the signals are returned to the WSP customers.
    Crown Castle’s DAS networks also transport signals for its WSP customers in the reverse
    direction, from a hub to a node.3
    DAS networks increase the coverage area of their WSP customers’ networks. Due
    to the small size of the DAS node equipment, it can be installed on existing structures in
    areas that traditional cell towers cannot be located, such as densely populated urban
    areas or stadiums. This provides augmented network coverage to WSPs’ retail end-users
    with minimal visual or physical impact, unlike cell towers. A WSP provider may operate
    3   The Federal Communications Commission has similarly explained:
    A DAS network consists of three primary components: (i) a
    number of remote communications nodes (DAS node(s)),
    each including at least one antenna for the transmission and
    reception of a wireless service provider’s RF signals; (ii) a high
    capacity signal transport medium (typically fiber optic cable)
    connecting each DAS node back to a central communications
    hub site; and (iii) radio transceivers or other head-end
    equipment located at the hub site that propagates and/or
    converts, processes or controls the communications signals
    transmitted and received through the DAS nodes.
    In re Implementation of Section 6002(b) of the Omnibus Budget Reconciliation Act of
    1993, 32 FCC Rcd. 8968, 8997 n.133 (FCC 2017).
    [J-81-2019] - 3
    its own DAS networks that serve only its customers, or it may lease a DAS network from
    a neutral host, such as Crown Castle.
    From 2005 to 2015, the PUC granted certificates of public convenience (CPC) to
    at least five neutral host DAS network operators, including Crown Castle NG and
    Pennsylvania-CLEC, to operate as Competitive Access Providers (CAP), concluding they
    were “public utilities” under Section 102 of the Code, which provides:
    “Public utility.”
    (1) Any person or corporations now or hereafter owning
    or operating in this Commonwealth equipment or
    facilities for:
    ...
    (vi) Conveying or transmitting messages or
    communications, except as set forth in
    paragraph (2)(iv), by telephone or telegraph or
    domestic public land mobile radio service
    including, but not limited to, point-to-point
    microwave radio service for the public for
    compensation.
    ...
    (2) The term does not include:
    ...
    (iv) Any person or corporation, not otherwise a
    public utility, who or which furnishes mobile
    domestic cellular radio telecommunications
    service.
    ...
    66 Pa.C.S. § 102; see also Crown Castle NG E. LLC v. Pa. Pub. Util. Comm’n, 
    188 A.3d 617
    , 620 (Pa. Cmwlth. 2018). Obtaining a CPC provides DAS networks with facilities
    [J-81-2019] - 4
    siting benefits in that they gain access to public rights-of-way, are exempted from local
    zoning rules, and can exercise the power of eminent domain. PUC Order, Review of
    Issues Relating to Comm’n Certification of Distributed Antennae Sys. Providers in Pa.,
    M-2016-2517831, 3/17/17, at 23, 30 [hereinafter DAS Order]; see also 66 Pa.C.S. § 1104
    (noting that a public utility cannot exercise the power of eminent domain until it receives
    a CPC).
    On November 19, 2015, the PUC granted a CPC to the neutral host DAS network
    operator SQF, LLC (SQF). However, two commissioners voted against issuing a CPC to
    SQF and filed statements explaining they concluded the PUC did not have jurisdiction to
    regulate or issue CPCs to DAS networks because they did not meet the Code’s definition
    of public utilities. See 66 Pa.C.S. § 501 (providing PUC has jurisdiction to supervise and
    regulate all public utilities in Pennsylvania). Thus, even though the PUC issued a CPC
    to SQF, it also directed the opening of formal proceedings to investigate the issue of the
    PUC’s jurisdiction over DAS network operators.
    On February 23, 2016, the PUC entered an order initiating a formal investigatory
    proceeding to determine whether it should continue to certify DAS networks as public
    utilities pursuant to Section 102(1)(vi) or whether DAS networks were “mobile domestic
    cellular radio telecommunications service[s],” which Section 102(2)(iv) excludes from the
    definition of public utility. Compare 66 Pa.C.S. § 102(1)(vi) with § 102(2)(iv). To guide
    its inquiry, the PUC issued 12 questions in an appendix to its investigation order and
    solicited comments and reply comments from interested parties. The PUC received
    comments from numerous stakeholders in three broad groups: Industry Stakeholders,4
    4  The Industry Stakeholders included DAS network providers (Crown Castle NG,
    Pennsylvania-CLEC, and ExteNet Systems, Inc. (ExteNet)), owners of
    telecommunications facilities, the Wireless Association (CTIA), and the Wireless
    Infrastructure Association (PCIA).
    [J-81-2019] - 5
    Municipal Stakeholders,5 and the Office of Consumer Advocate.
    Without holding a formal hearing, the PUC issued its March 17, 2017 DAS Order,
    which found that DAS networks were not entitled to certification as public utilities, but
    instead were excluded from the definition of public utilities under Section 102(2)(iv)
    because they “furnish[ed] mobile domestic cellular radio telecommunications service.”
    See 66 Pa.C.S. § 102(2)(iv). The PUC began its analysis of Section 102 by stating that
    DAS network providers met the definition of public utility in Section 102(1)(vi) because
    they operate facilities that convey or transmit messages or communications. DAS Order
    at 14. However, the PUC then concluded that DAS networks were excluded from the
    definition of public utility by Section 102(2)(iv) because they “furnish mobile domestic
    cellular radio telecommunications service.”
    Id. at 23
    (quoting 66 Pa.C.S. § 102(2)(iv)).
    The PUC arrived at this conclusion by analyzing the technology DAS networks
    employ. The PUC explained that DAS networks provide personal wireless service by
    sending and receiving RF signals from the antenna at the node.
    Id. at 15-17
    (relying on
    In re Acceleration of Broadband Deployment by Improving Wireless Facilities Siting
    Policies, 29 FCC Rcd. 12865, 12973 at ¶ 270 (FCC 2014) [hereinafter 2014 Wireless
    Infrastructure Order] (stating “to the extent DAS . . . are or will be used for the provision
    of personal wireless services, their siting applications are subject to the same
    presumptively reasonable timeframes that apply to applications related to other personal
    wireless service facilities.”)). Because DAS networks’ antennae send and receive RF
    signals, the PUC rejected the DAS providers’ contention that they provide “backhaul
    5  The Municipal Stakeholders represented nearly all of Pennsylvania’s 2,600
    municipalities and included the Pennsylvania Municipal League (PML), the Pennsylvania
    State Association of Township Supervisors (PSATS), the Pennsylvania State Association
    of Boroughs (PSAB), the Pennsylvania State Association of Township Commissioners
    (PSATC), and multiple individual municipalities.
    [J-81-2019] - 6
    service.”6
    Id. at 16-17.
    Similarly, the PUC dismissed the claim that the WSPs generate
    the RF signal, as the PUC found the DAS providers also wirelessly send and receive that
    RF signal.
    Id. at 17.
    Defining the term “furnish” in Section 102(2)(iv) as “to provide” or
    “to supply,” the PUC concluded that DAS networks furnish, provide, and supply personal
    wireless services.
    Id. at 18,
    18 n.46 (using Macmillan Dictionary, Merriam-Webster
    Dictionary, Oxford English Dictionary, and Black’s Law Dictionary to define “furnish”).
    The PUC next found that DAS facilities are used to furnish “mobile” wireless
    services. Applying the Federal Communications Commission’s rules and definitions, the
    PUC focused on whether the end-user’s equipment is mobile or fixed.
    Id. at 21.
    The
    PUC found the wireless communication that DAS networks transmit is to mobile devices
    including smartphones and tablets.
    Id. at 22.
    The PUC rejected the DAS providers’
    contention that their service is not mobile because they transport signals between fixed
    nodes and stationary hubs.
    Id. The PUC
    explained that the large dishes on macro towers
    are similarly stationary but are considered part of a mobile service. Accordingly, the PUC
    concluded “DAS facilities furnish mobile domestic cellular radio telecommunications
    service and, hence, cannot be certificated as public utilities under the Code.”
    Id. at 23
    .
    6   The FCC has explained “backhaul services” as follows:
    Another component [of wireless infrastructure facilities] is the
    backhaul connections that link a mobile wireless service
    provider’s cell sites to the mobile switching centers that
    provide connections to the provider’s core network, the public
    switched telephone network, or the Internet, carrying wireless
    voice and data traffic for routing and onward transmission.
    Backhaul facilities are generally provided by incumbent local
    exchange carriers (ILECs), competitive local exchange
    carriers (CLECs), competitive fiber and microwave
    wholesalers, cable providers, and independent backhaul
    operators.
    In re Comm’ns Marketplace Report, FCC 18-181, 
    2018 WL 6839365
    , at *16 n.108 (FCC
    2018).
    [J-81-2019] - 7
    The PUC considered its decision’s interaction with federal law.
    Id.
    The PUC
    dismissed concerns that decertification was a barrier to entry in violation of federal law.
    Id. Further, the
    PUC noted that federal law cannot compel it to certify a public utility based
    on potential siting complications arising from local ordinances.
    Id. at 23
    -24. The PUC
    conceded that federal law precludes the PUC from requiring DAS network operators to
    obtain a CPC.
    Id. at 24.
    Next, the PUC addressed the implications of its decision to no longer certify DAS
    networks as public utilities related to facilities’ siting.
    Id. The PUC
    dismissed the DAS
    providers’ concern that they would have difficulties obtaining pole attachments without
    CPCs because the DAS Order recognized DAS operators provide telecommunications
    service, and the FCC granted pole attachment rights to all telecommunications providers.
    Id. at 25.
    Moreover, the PUC stated “it is illegal for any utility to require a CPC from this
    Commission as a requirement for allowing a telecommunication[s] service provider to
    exercise its pole occupancy rights.”
    Id. at 27.
    Likewise, the PUC dismissed the DAS
    providers’ contention that its ruling would affect DAS providers’ ability to access public
    rights-of-way by noting that such access is protected under federal and state law.
    Id. at 28
    (citing 47 U.S.C. § 253(a), (c); FCC’s 2009 Shot Clock Ruling, 24 FCC Rcd. 13994;
    FCC’s 2014 Wireless Infrastructure Order; Pennsylvania Wireless Broadband Collocation
    Act of 2012 (Act 191)). Finally, the PUC acknowledged that its decision would preclude
    DAS operators from exercising the power of eminent domain and from overriding local
    zoning rules.
    Id. at 32.
    It defended that outcome as appropriate because the General
    Assembly did not provide those rights to DAS providers in Act 191, which gave the courts
    of common pleas oversight of zoning disputes and did not provide the PUC the ability to
    issue CPCs to override that oversight.
    Id. (citing 53
    P.S. § 11702.5(a)).
    [J-81-2019] - 8
    Crown Castle and ExteNet filed timely petitions for reconsideration, which the PUC
    denied on May 4, 2017. Crown Castle filed a petition for review in the Commonwealth
    Court, which the court granted.
    A unanimous, en banc Commonwealth Court7 reversed the PUC’s DAS Order.
    Crown 
    Castle, 188 A.3d at 637
    .          The Commonwealth Court engaged in statutory
    construction of Section 102, stating it would apply the plain language of the statute unless
    it was ambiguous.
    Id. at 630-31.
    Addressing the PUC’s argument that its interpretation
    of Section 102 was entitled to “substantial deference,” the court explained that the DAS
    Order represented a change in the PUC’s interpretation of Section 102 and, accordingly,
    the court would not give it much deference.
    Id. at 631.
    In support, the Commonwealth
    Court quoted its prior decision in Dauphin County Industrial Development Authority v.
    Pennsylvania Public Utility Commission, 
    123 A.3d 1124
    (Pa. Cmwlth. 2015), stating, “‘[a]n
    administrative agency may revise and correct its prior interpretation of a statute; but ‘it
    cannot expect that its later interpretation is entitled to very much deference.’”
    Id. (quoting Dauphin
    County, 123 A.3d at 1135
    ) (emphasis omitted)). The court also relied on Mazza
    v. Secretary of Department of Health & Human Services, 
    903 F.2d 953
    (3d Cir. 1990),
    which likewise explained that an agency’s altered interpretation of a statute is given little
    deference.
    Id. (citing Mazza,
    903 F.2d at 958). After noting that the legislature had not
    changed Section 102 of the Code since 2005 when the PUC began granting CPCs to
    DAS operators, the Commonwealth Court found “the [PUC’s] interpretation set forth in
    the DAS Order is not entitled to much deference.”
    Id. at 632.
    Construing the language of Section 102, the Commonwealth Court noted that the
    PUC found that DAS networks meet the general definition of public utility in Section
    102(1)(vi); thus, the court focused on the PUC’s conclusion that DAS networks are
    7   Judge Brobson did not participate in the decision.
    [J-81-2019] - 9
    excluded from this definition by Section 102(2)(iv).
    Id. at 631-32.
    The court reasoned
    that the PUC erred by adding the Section 102(1)(vi) phrase “owning or operating . . .
    equipment or facilities” to Section 102(2)(iv), which effectively expanded the scope of the
    exclusion.
    Id. at 632.
    “Under the [PUC’s] interpretation, the exclusion now includes not
    only a person or company that ‘furnishes’ CMRS, but also a person or company who owns
    or operates equipment that is used, pursuant to a service agreement, in furnishing CMRS,
    even if that person or company does not, itself, furnish CMRS.”
    Id. The court
    explained
    that adding words or phrases to a statute in a way that changes its scope and operation
    is prohibited.
    Id. (citing 1
    Pa.C.S. § 1923(c); Pa. Sch. Bds. Ass’n, Inc. v. Pub. Sch.
    Employees. Ret. Bd., 
    863 A.2d 432
    , 439 (Pa. 2004)). Further, the court concluded the
    PUC’s interpretation did not give effect to the legislature’s omission of the “owner/operator
    of equipment/facilities” language from Section 102(2)(iv).
    Id. Therefore, the
    Commonwealth Court held the PUC’s interpretation of the Section 102(2)(iv) exclusion
    was not consistent with the statute’s plain language.
    Id. After concluding
    the PUC erred in its interpretation of Section 102(2)(iv), the
    Commonwealth Court analyzed whether DAS networks actually “furnish” CMRS and
    concluded they did not.
    Id. at 633.
    In contrast to the WSPs, the court explained the DAS
    network operators do not own a wireless spectrum, do not issue or use phone numbers,
    and do not have a contract with the retail end-user.
    Id. Additionally, the
    DAS operators
    transport a wireless signal only after the WSPs and their end-users generate it.
    Id. Due to
    these discrepancies, the Commonwealth Court found that DAS networks were
    incapable of furnishing CMRS.
    Id. Further, the
    court reasoned that the PUC’s error was
    focusing on the fact that WSPs use DAS networks to furnish the WSPs’ CMRS instead of
    analyzing whether DAS networks have the capacity to furnish CMRS.
    Id. According to
    [J-81-2019] - 10
    the Commonwealth Court, this conflated the WSPs’ provision of CMRS with the DAS
    network operators’ transmittal services.
    The Commonwealth Court analogized this case to Rural Telephone Co. Coalition
    v. Public Utility Commission, 
    941 A.2d 751
    (Pa. Cmwlth. 2008), in which it held that the
    transmission path that Core Communications provided to internet service providers (ISP)
    was a telecommunications service, even though the PUC did not have jurisdiction over
    the ISP service. Crown 
    Castle, 188 A.3d at 633
    (citing Rural 
    Tel., 941 A.2d at 758
    ). The
    analysis in Rural Telephone led the Commonwealth Court to conclude that the DAS
    networks’ transportation service is a jurisdictional telecommunications service even
    though the WSPs use DAS networks to provide CMRS, which is not regulated by the
    PUC.
    Id. at 634.
    “Thus, like Core in Rural Telephone, Crown Castle and other neutral-
    host DAS network operators offer contractual transport services to their WSP customers
    that should not, as the Commission did in the DAS Order, be equated to the CMRS offered
    by the WSP, over which the Commission has no jurisdiction.”
    Id. Moreover, the
    Commonwealth Court noted its conclusion that DAS networks do
    not furnish CMRS was consistent with the decisions of the Texas Public Utility
    Commission and the California Public Utility Commission.
    Id. at 634-35
    (discussing
    Complaint of ExteNet Network Sys., Inc., against the City of Houston for Imposition of
    Fees for Use of Pub. Right of Way, 
    2017 WL 2079683
    , at *4-5 (Tex. P.U.C. 2017)
    (concluding a DAS network provided a telecommunications service, not a CMRS service);
    City & County of S.F. v. NextG Networks of Cal., Inc., 
    2006 WL 151886
    , at *3-4 (Cal.
    P.U.C. 2006) (finding a DAS network provider had the right to place its components in
    public rights-of-way and to provide RF transport services as a telecommunications
    service)). Accordingly, the Commonwealth Court concluded that the PUC’s finding that
    DAS network operators actually furnish CMRS was inconsistent with Rural Telephone’s
    [J-81-2019] - 11
    treatment of transportation services and with other jurisdictions’ classification of DAS
    networks.
    Id. Finally, the
    Commonwealth Court found the FCC’s 2014 Wireless Infrastructure
    Order does not support the PUC’s treatment of DAS networks as furnishing CMRS.
    Id. at 636.
    The court explained that the FCC’s ruling was that siting protections for wireless
    facilities would apply to DAS facilities to the extent they supply “personal wireless
    services.”
    Id. The court
    noted the federal act distinguishes “personal wireless services”
    from “personal wireless service facilities.”
    Id. (quoting 47
    U.S.C. § 332(c)(7)(C) (defining
    “personal wireless services” as including CMRS and defining “personal wireless service
    facilities” as “facilities for the provision of personal wireless services”)). The court found
    this distinction undercut the PUC’s holding that DAS networks provide personal wireless
    service.
    Id. Further, the
    court distinguished the 2014 Wireless Infrastructure Order
    because it addressed extending siting protections to DAS networks; it did not address
    whether DAS networks provide CMRS, which was the question before the PUC.
    Id. The court
    reasoned, “[u]nlike Section 332(c)(7)(C) of the Federal Act, which separately
    addresses ‘personal wireless services’ and ‘personal wireless service facilities,’ the
    exclusion set forth in [Section 102(2)(iv)] applies only to those persons or companies that
    furnish the CMRS itself and does not, by its terms, address those that operate facilities
    that are used to provide CMRS that do not, themselves, furnish CMRS.”
    Id. For these
    reasons, the Commonwealth Court reversed the PUC because its recent interpretation of
    Section 102(2)(iv) to exclude DAS networks as public utilities on the basis that they furnish
    CMRS “is not supported by the plain language of the Code or the principles of statutory
    construction, the precedent of [the Commonwealth Court], the determinations of public
    utility commissions in other jurisdictions, or the 2014 Wireless Infrastructure Order.”
    Id. This Court
    granted the PUC’s petition for allowance of appeal to consider:
    [J-81-2019] - 12
    (1) Did the Commonwealth Court err in holding, based on its
    misinterpretation and misapplication of a federal court case,
    that the PUC was not entitled to deference as to its expert
    interpretation of its enabling statute?
    (2) On a question of first impression involving the jurisdictional
    status of operators of Distributed Antenna Systems, did the
    Commonwealth Court commit an error of law by determining
    that the PUC’s interpretation of the definition of “public utility”
    and the statutory exclusion for wireless service was
    inconsistent with the statutory language and rules of statutory
    construction?
    (3) Did the Commonwealth Court commit an error of law by
    determining that the Commission’s finding that Distributed
    Antenna Systems are not jurisdictional public utilities was
    inconsistent with the Commonwealth Court’s precedent and
    federal law?
    Crown Castle NG E. LLC v. Pa. Pub. Util. Comm’n, 
    200 A.3d 7
    (Pa. 2019) (per curiam).
    As these issues require statutory interpretation, our standard of review is de novo,
    and our scope of review is plenary and non-deferential. Harmon v. Unemployment Comp.
    Bd. of Review, 
    207 A.3d 292
    , 298 (Pa. 2019). When engaging in statutory construction,
    a court’s duty is to give effect to the legislature’s intent and to give effect to all of a statute’s
    provisions. 1 Pa.C.S. § 1921(a). The best indication of legislative intent is the plain
    language of the statute. Matter of Private Sale of Prop. by Millcreek Twp. Sch. Dist., 
    185 A.3d 282
    , 290-91 (Pa. 2018). In ascertaining the plain meaning, we consider the statutory
    language in context and give words and phrases their “common and approved usage.”
    Commonwealth by Shapiro v. Golden Gate Nat’l Senior Care LLC, 
    194 A.3d 1010
    , 1027
    (Pa. 2018). When statutory language is clear and unambiguous, courts must give effect
    to the words of the statute and must not disregard the text to implement its objective. Id.;
    1 Pa.C.S. § 1921(b). “Only if the statute is ambiguous, and not explicit, do we resort to
    other means of discerning legislative intent.” Millcreek Twp. Sch. 
    Dist., 185 A.3d at 291
    ;
    1 Pa.C.S. § 1921(c). When a statute is ambiguous, a court may ascertain the intention
    [J-81-2019] - 13
    of the legislature by looking at, among other things, administrative interpretations of the
    statute. 1 Pa.C.S. § 1921(c)(8).
    We first consider whether the Commonwealth Court erred in holding that the PUC’s
    interpretation of Section 102 was not entitled to much deference. The PUC argues that
    the Commonwealth Court failed to accord proper deference to its interpretation of the
    statute it is responsible for enforcing. The PUC asserts the Commonwealth Court’s
    reliance on Mazza was erroneous. The PUC reads Mazza as permitting an agency “‘to
    adapt [its] rules and policies to the demands of changing circumstances’” and affording
    deferential review to an agency’s newly altered rules and policies if the agency can show
    it applied “‘a reasoned analysis indicating that prior policies and standards are being
    deliberately changed, not casually ignored.’” PUC’s Brief at 34-35 (quoting 
    Mazza, 903 F.2d at 958
    -59). In support of its reading of Mazza, the PUC notes that the Third Circuit
    explained that Mazza does not freeze an agency’s interpretation but requires a reasoned
    decision to support an altered interpretation.
    Id. at 35-36
    (citing Sacred Heart Med. Ctr.
    v. Sullivan, 
    958 F.2d 537
    , 544 (3d Cir. 1992)). Accordingly, the PUC contends it was
    entitled to deference under Mazza because its decision was “well-reasoned, deliberate,
    and was made only after considering comments from interested parties.”8
    Id. at 36.
    Contrary to the Commonwealth Court’s reliance on Mazza to conclude PUC’s new
    interpretation was not entitled to deference, the PUC claims a number of this Court’s
    decisions stand for the principle that an agency’s statutory interpretation is entitled to
    8 Similarly, Intervenors, the Pennsylvania Municipal League, Pennsylvania State
    Association of Township Supervisors, Pennsylvania State Association of Boroughs, and
    Pennsylvania State Association of Township Commissioners (collectively, Municipal
    Parties), distinguish Mazza on the basis that Mazza involved an administrative agency
    employee’s departure from the agency’s prior policy without reasoned justification.
    Municipal Parties’ Brief at 8. The difference between Mazza and this case, the Municipal
    Parties argue, is that this case involves a change of circumstance, which is the PUC
    deciding to examine whether DAS operators are public utilities, and the PUC’s decision
    was the result of a deliberative process, not arbitrarily rendered.
    Id. at 9.
    [J-81-2019] - 14
    “great deference.”
    Id. at 36-37
    (relying on Alpha Auto Sales v. Dep’t of State, 
    644 A.2d 153
    , 155 (Pa. 1994)). The PUC argues that this Court recently relied on Alpha Auto Sales
    to conclude that it is legal error for the Commonwealth Court to summarily disregard an
    agency’s interpretation of a statute it administers.
    Id. at 37
    (discussing Snyder Bros. v.
    Pa. Pub. Util. Comm’n, 
    198 A.3d 1056
    , 1079 (Pa. 2018)). According to the PUC, this
    Court has consistently given deference to an agency when it is interpreting a technically
    complex statutory scheme.
    Id. at 37
    -38 (relying on Popowsky v. Pa. Pub. Util. Comm’n,
    
    706 A.2d 1197
    (Pa. 1997)). Moreover, the PUC states this Court has previously held that
    “an agency may revise its policies and amend its regulations in interpreting its statutory
    mandates. Further, past interpretation of a statute, though approved by the judiciary,
    does not bind the Commission to that particular interpretation.”
    Id. at 38
    (quoting Elite
    Indus. v. Pa. Pub. Util. Comm’n, 
    832 A.2d 428
    , 431-32 (Pa. 2003)). Applying these cases,
    the PUC argues the Commonwealth Court’s decision “has essentially eliminated the
    judicial doctrine by which appellate courts defer to an agency’s interpretation of a statute
    for which [it] has enforcement responsibility.”
    Id. at 39
    . 
    Instead, the PUC urges this Court
    to adopt a deference standard that would permit an agency to respond to changing times
    by revising and correcting its prior interpretation of a statute based on reasoned
    justifications.9
    Id. Crown Castle
    argues that the PUC’s interpretation of an unambiguous statutory
    provision is not entitled to judicial deference. Crown Castle’s Brief at 19. Crown Castle
    maintains that statutory construction is a judicial function, and courts must disregard an
    agency’s interpretation that is inconsistent with a statute’s plain language.
    Id. at 20.
    In
    9The Municipal Parties also contend that the Commonwealth Court erred by not affording
    substantial deference to PUC’s interpretation of its technically complex enabling statute.
    Municipal Parties’ Brief at 6-10.
    [J-81-2019] - 15
    support of its position, Crown Castle quotes this Court’s discussion of deference to an
    agency’s statutory interpretation:
    While courts traditionally accord the interpretation of the
    agency charged with administration of the act some
    deference, the meaning of a statute is essentially a question
    of law for the court, and, when convinced that the
    interpretative regulation adopted by an administrative agency
    is unwise or violative of legislative intent, courts disregard the
    regulation.
    Id. (quoting Phila.
    Suburban Corp. v. Commonwealth, Bd. of Fin. & Revenue, 
    635 A.2d 116
    , 118 (Pa. 1993)). Based on the PUC’s concessions in this case that Section 102’s
    language is clear, Crown Castle contends the PUC does not have the discretion to
    disregard the legislature’s plain intent.10
    Id. Accordingly, Crown
    Castle argues this Court
    should decide this question of law without deferring to the PUC’s interpretation.
    Id. Crown Castle
    further contends that an agency’s reversal of its prior interpretation
    of a statute is due less deference than on issues of first impression.
    Id. at 30.
    Crown
    Castle concedes that in some cases the PUC’s interpretation of the Code may be entitled
    to some level of deference but disagrees with PUC’s contention that its interpretations
    are essentially insulated from judicial review.
    Id. at 29-30.
    Responding to the PUC’s
    criticism of the Commonwealth Court’s reliance on Mazza, Crown Castle asserts the
    Commonwealth Court properly relied on its decision in Dauphin County and did not create
    a new deference standard.
    Id. at 30.
    Crown Castle explains that in Dauphin County, the
    court explained that the PUC is entitled to deference where the legislature has not
    addressed the issue, but the PUC is not given deference if the statute is unambiguous.
    10 Similarly, Intervenor Extenet Systems, Inc. argues the DAS Order in this case is an
    interpretive statement that is not entitled to the same level of deference that is given to
    formal agency rulemakings or adjudications. Extenet’s Brief at 13-14 (quoting Nw. Youth
    Servs., Inc. v. Commonwealth, Dep’t of Welfare, 
    66 A.3d 301
    (Pa. 2013) (stating the
    validity of an interpretive rule turns on the willingness of a court to conclude the rule tracks
    the meaning of the statute)).
    [J-81-2019] - 16
    Id. at 31.
    The Dauphin County Court bolstered its conclusion by noting that the PUC’s
    interpretation had changed, which the court stated was permissible but also not entitled
    to very much deference.
    Id. (quoting Dauphin
    County, 123 A.3d at 1135
    ). According to
    Crown Castle, the Commonwealth Court used the same standard in this case, and it
    correctly decided the PUC’s changing interpretation was not entitled to the level of
    deference the PUC sought.
    Id. at 33.
    The reduced deference was especially warranted,
    in Crown Castle’s view, because the PUC’s interpretation is not longstanding and was not
    contemporaneous with the enactment of the Code; instead, the PUC’s interpretation
    shifted while the Code’s language regarding public utilities remained the same.
    Id. at 33-
    34 (distinguishing this case from Alpha Auto Sales).
    Responding to the PUC’s assertion it is due deference under Mazza, Crown Castle
    argues PUC’s justification for altering its interpretation was not reasonable or supported
    by the record.
    Id. at 34.
    Crown Castle points out that DAS technology has existed for at
    least 15 years, and PUC had been certificating DAS networks for over 10 years.
    Id. at 36.
    Along these lines, Crown Castle states that from its initial application (filed as
    “NextG”) to the PUC until now, the components of its networks have not changed nor has
    its description of its services.
    Id. at 36-37
    . Accordingly, Crown Castle submits that there
    has not been any technological evolution that would justify the PUC’s shifting
    interpretation of Section 102.
    Id. at 37
    .
    In its reply brief, the PUC characterizes its DAS Order as an adjudication entitled
    to deference. PUC’s Reply Brief at 10. The PUC notes Title 2 of the Pennsylvania
    Consolidated Statutes define an “adjudication” as “‘any final order, decree, decision,
    determination or ruling by an agency affecting personal or property rights, privileges,
    immunities, duties, liabilities or obligations of any or all of the parties to the proceeding in
    which the adjudication is made.’”
    Id. (quoting 2
    Pa.C.S. § 101). Explaining that its DAS
    [J-81-2019] - 17
    Order concluded DAS network operators furnish wireless telecommunications services,
    which ended the PUC’s investigation, and applied to all interested stakeholders, the PUC
    contends the DAS Order is a valid adjudication.
    Id. at 11-12.
    Accordingly, the PUC asks
    this Court to give its decision, which turned on its interpretation of its enabling statute,
    proper deference.
    Id. at 12.
    After careful consideration, we conclude that the Commonwealth Court correctly
    determined that the PUC’s interpretation of Section 102 of the Code was not entitled to
    deference. A court does not defer to an administrative agency’s interpretation of the plain
    meaning of an unambiguous statute because statutory interpretation is a question of law
    for the court. This Court has differentiated between the two rule-making functions of an
    administrative agency and the level of deference afforded to each:
    There is a well-recognized distinction in the law of
    administrative agencies between the authority of a rule
    adopted by an agency pursuant to what is denominated by the
    textwriters as legislative rule-making power and the authority
    of a rule adopted pursuant to interpretative rule-making
    power. The former type of rule ‘is the product of an exercise
    of legislative power by an administrative agency, pursuant to
    a grant of legislative power by the Legislative body,’ and ‘is
    valid and is as binding upon a court as a statute if it is (a)
    within the granted power, (b) issued pursuant to proper
    procedure, and (c) reasonable.’ K. C. Davis, 1 Administrative
    Law Treatise s 5.03, at 299 (1958). A court, in reviewing such
    a regulation, ‘is not at liberty to substitute its own discretion
    for that of administrative officers who have kept within the
    bounds of their administrative powers. To show that these
    have been exceeded in the field of action . . . involved, it is not
    enough that the prescribed system of accounts shall appear
    to be unwise or burdensome or inferior to another. Error or
    unwisdom is not equivalent to abuse. What has been ordered
    must appear to be ‘so entirely at odds with fundamental
    principles . . . as to be the expression of a whim rather than
    an exercise of judgment.[’] American Telephone & Telegraph
    Co. v. United States, 
    299 U.S. 232
    (1936). See also Seattle
    First National Bank v. United States, 
    44 F. Supp. 603
    , 607
    (E.D. Wash.1942); In re Da Lomba's Case, 
    227 N.E.2d 513
    ,
    517 (Mass. 1967) (‘rules which have been promulgated
    [J-81-2019] - 18
    pursuant to a legislative grant of power generally have the
    force of law. . . .’); Barry Laboratories v. Wisconsin Board of
    Pharmacy, 
    132 N.W.2d 833
    (Wis. 1965); Duke Molner
    Wholesale Liquor Co. v. Martin, 
    180 Cal. App. 2d 873
    (19[60]),
    cert. denied, 
    364 U.S. 870
    (1960) (‘An administrative rule
    which is legislative in character is subject to the same test with
    reference to its validity as is an act of the Legislature. . . .’);
    Report of the U.S. Attorney General's Commission on
    Administrative Procedure 99-100 (1941).
    An interpretative rule on the other hand depends for its
    validity not upon a law-making grant of power, but rather upon
    the willingness of a reviewing court to say that it in fact tracks
    the meaning of the statute it interprets. While courts
    traditionally accord the interpretation of the agency charged
    with administration of the act some deference, the meaning of
    a statute is essentially a question of law for the court, and,
    when convinced that the interpretative regulation adopted by
    an administrative agency is unwise or violative of legislative
    intent, courts disregard the regulation.
    Pa. Human Relations Comm’n v. Uniontown Area Sch. Dist., 
    313 A.2d 156
    , 169 (Pa.
    1973) (parallel citations omitted).
    “While an agency’s interpretation of an ambiguous statute it is charged with
    enforcing is entitled to deference, courts’ deference never comes into play when the
    statute is clear.” Seeton v. Pa. Game Comm’n, 
    937 A.2d 1028
    , 1037 (Pa. 2007); see also
    1 Pa.C.S. § 1921(c)(8) (providing a court interpreting an ambiguous statute may consider
    an agency’s interpretation of it). In this case, the PUC acknowledges Section 102 of the
    Code is clear and unambiguous. PUC’s Brief at 41 (contending “[t]he definition of public
    utility and the relevant wireless telecommunications/CMRS exclusion set forth in the Code
    does not require the application of principles of statutory construction because the
    language is clear.”). As discussed below, we agree that Section 102 is unambiguous.
    Nonetheless, the PUC maintains that its interpretation is entitled to “great
    deference,” relying on Alpha Auto Sales, Snyder Brothers, Popowsky, and Elite
    Industries. Those cases, however, did not involve an agency’s interpretation of an
    [J-81-2019] - 19
    unambiguous statute and are distinguishable from this case. In Alpha Auto Sales and
    Snyder Brothers, this Court gave deference to the agencies’ constructions of ambiguous
    statutes. See Alpha Auto 
    Sales, 644 A.2d at 155
    (explaining the term “new” vehicle in
    the Board of Vehicles Act was ambiguous and giving deference to the agency’s
    interpretation); Snyder 
    Bros., 198 A.3d at 1073
    , 1077 (finding the term “any” in the Oil
    and Gas Act ambiguous and employing statutory construction principles, including
    consulting the agency’s interpretation). In Popowsky, this Court first interpreted the
    statute at issue, agreeing with the PUC’s construction, and then held that the
    Commonwealth Court exceeded its scope of review by not upholding the PUC’s
    interpretation, which was reasonable and not clearly erroneous. 
    Popowsky, 706 A.2d at 1202-03
    . The Popowsky Court further stated that “[j]udicial deference is even more
    necessary when the statutory scheme is technically complex, as it is in this case.”
    Id. at 1203.
    Lastly, the Elite Industries Court deferred to the PUC’s amendment of a regulation,
    not its interpretation of a statute. Elite 
    Industries, 832 A.2d at 483-84
    (concluding “[t]his
    situation falls squarely within the PUC’s area of expertise and is best left to the
    commission’s discretion.”). Contrary to the PUC’s argument in this case, these cases do
    not stand for the proposition that an agency’s interpretation of an unambiguous statute is
    entitled to deference. Instead, they illustrate that deference is appropriate when a statute
    is ambiguous or when the statutory scheme is complex and falls within the agency’s area
    of expertise. Because this case involves the construction of an unambiguous statute, we
    do not defer to the PUC’s interpretation. See Gen. Motors, LLC. v. Bureau of Prof’l &
    Occupational Affairs, 
    212 A.3d 40
    , 48 (Pa. 2019) (“In all events, this Court has maintained
    its role as the final arbiter in matters of statutory construction.”).
    Moreover, the level of deference a court gives to an administrative agency’s
    interpretation of an unambiguous statute is not affected by the consistency of the
    [J-81-2019] - 20
    agency’s interpretation, but on the interpretation’s adherence to the language of the
    statute. The Commonwealth Court relied on Mazza for the principle that an agency’s
    revised interpretation of a statute is not entitled to much deference. Crown 
    Castle, 188 A.3d at 631
    ; see also 
    Mazza, 903 F.2d at 958
    -59 (explaining courts typically reject an
    administrative interpretation that “‘flatly contradicts the position which the agency had
    enunciated at an earlier date, closer to the enactment of the governing statute.’”).
    Following Mazza, the Third Circuit reaffirmed its explanation that inconsistent
    administrative interpretations are given lower deference, but an agency is not “locked into
    the first interpretation it espouses” as long as the agency provides a “‘reasoned
    justification’” for its revision. 
    Sullivan, 958 F.2d at 543
    . In Sullivan, Sacred Heart Hospital
    sought Medicare reimbursement from the Secretary of Health and Human Services for
    the hospital’s increased operating costs resulting from an expansion of its facilities.
    Id. at 539.
    The agency denied the reimbursement because the plain language of the governing
    statute did not permit it, even though the agency had previously interpreted the same
    statute differently.
    Id. at 542.
    Upholding the agency’s decision, the Third Circuit set forth
    the United States Supreme Court’s pronouncement on the deference afforded to an
    agency’s construction of the statute it administers:
    First, always, is the question whether Congress has directly
    spoken to the precise question at issue. If the intent of
    Congress is clear, that is the end of the matter; for the court,
    as well as the agency, must give effect to the unambiguously
    expressed intent of Congress.9 If, however, the court
    determines Congress has not directly addressed the precise
    question at issue, the court does not simply impose its own
    construction on the statute, as would be necessary in the
    absence of an administrative interpretation. Rather, if the
    statute is silent or ambiguous with respect to the specific
    issue, the question for the court is whether the agency’s
    answer is based on a permissible construction of the statute.
    ---------------------------------------------------------------------------------
    [J-81-2019] - 21
    9 The judiciary is the final authority on issues of statutory
    construction and must reject administrative constructions
    which are contrary to clear congressional intent.
    Id. at 544
    (quoting Chevron, U.S.A., Inc. v. Nat. Res. Def. Council, Inc., 
    467 U.S. 837
    ,
    842-43 (1984) (some footnotes omitted)).11
    Applying Chevron, the Third Circuit found that the agency provided a “reasoned
    justification” for its revised interpretation, in that the agency conceded its prior
    interpretation was erroneous and its new interpretation gave effect to the plain language
    of the statute.
    Id. at 545.
    Examining the plain meaning of the statute, the Third Circuit
    agreed with the agency’s interpretation.
    Id. at 546.
    Thus, the federal precedent is
    consistent with our conclusion that an agency must follow the plain language of an
    unambiguous statute, and courts will not defer to its interpretation of a clear statute. This
    is true regardless of whether the agency’s interpretation has changed over time; the
    touchstone is whether the agency’s interpretation adheres to the clear meaning of the
    statute. As we have repeatedly admonished, “the meaning of the statute is ultimately a
    question of law for the reviewing court.” Borough of Pottstown v. Pa. Mun. Ret. Bd., 
    712 A.2d 741
    , 744 (Pa. 1998). Accordingly, the Commonwealth Court did not err in concluding
    the PUC’s interpretation of Section 102 was not entitled to deference.
    Having concluded the PUC’s interpretation of Section 102 is not entitled to
    deference, we now examine whether the Commonwealth Court erred in determining that
    the PUC’s interpretation of the definition of “public utility” was inconsistent with the
    language of Section 102. To resolve this issue, the PUC contends that we do not need
    to resort to the principles of statutory construction because the language of Section 102
    11While this Court has never expressly adopted the federal Chevron approach, we have
    recognized that “[t]he Chevron approach to such cases at the federal level, however, is
    indistinguishable from our own approach to agency interpretations of Commonwealth
    statutes.” 
    Seeton, 937 A.2d at 1037
    n.12.
    [J-81-2019] - 22
    is clear and unambiguous.12 PUC’s Brief at 41. Examining Section 102(1)(vi)’s definition
    of public utility, the PUC notes that it has jurisdiction over point-to-point services, including
    microwave point-to-point service, and backhaul transport services.
    Id. Additionally, the
    PUC reads Section 102(2)(iv) as excluding from its jurisdiction “a person or corporation
    furnishing mobile domestic cellular radio telecommunications service or CMRS[.]”
    Id. Because the
    DAS transport services use antennae that directly receive wireless RF
    signals from mobile devices, the PUC contends that the DAS networks “indirectly” furnish
    CMRS.
    Id. at 42.
    The PUC argues “[t]o assert that a person or corporation that operates
    radio frequency transmission equipment fundamental to the furnishing of CMRS is itself
    not furnishing CMRS is an absurd and unreasonable interpretation of the statutory section
    and effectively nullifies the CMRS exclusion.”
    Id. at 47
    (emphasis in original). Thus,
    according to the PUC an entity that “facilitates” the furnishing of CMRS is equivalent to
    the entity that furnishes CMRS “outright.”13
    Id. 12 In
    contrast to the PUC, the Municipal Parties argue Section 102 is ambiguous because
    it does not expressly state whether wholesale CMRS providers are excluded from its
    definition of public utility. Municipal Parties’ Brief at 11. Municipal Parties assert
    wholesale CMRS providers, like retail CMRS providers, should be excluded to avoid the
    unreasonable result of subjecting retail and wholesale CMRS providers to different rights
    and regulations even though they use identical equipment and provide identical services.
    Id. 13 Unlike
    the PUC and the Municipal Parties, the Communications Workers of America
    (CWA), in its amicus brief, does not equate Section 102(2)(iv)’s use of the phrase “mobile
    domestic cellular radio telecommunications service” with CMRS. Instead, CWA notes
    “service” is defined by the Code as, inter alia, “any and all facilities used, furnished, or
    supplied by public utilities . . . in the performance of their duties under this part[.]” CWA’s
    Amicus Brief at 6 (quoting 66 Pa.C.S. § 102). CWA’s position is that regardless of which
    entity owns the DAS network equipment, “privately owned facilities used to provide utility
    service, or that otherwise become part of the utility’s network, are considered to be
    facilities of the public utility that are subject to regulation by the Commission.”
    Id. at 8
    (relying on Overlook Dev. Co. v. Pa. Pub. Serv. Comm’n, 
    101 Pa. Super. 217
    (1931),
    Lehigh Nav. Coal Co. v. Pa. Pub. Util. Comm’n, 
    1 A.2d 540
    (Pa. Super. 1938), and Rogoff
    v. Buncher Co., 
    151 A.2d 83
    (Pa. 1959)). As such, CWA argues that DAS networks are
    [J-81-2019] - 23
    In contrast, Crown Castle stresses the focus of the Section 102(2)(iv) exclusion is
    on the service provided, not the equipment used to provide that service. Crown Castle’s
    Brief at 22. According to Crown Castle, the PUC has consistently conflated the service
    with the equipment as is evident in its initial order stating “[o]ur statute excludes from our
    jurisdiction any person that operates equipment that ‘furnishes mobile domestic cellular
    radio telecommunications service.’” Crown Castle’s Brief at 21 (quoting DAS Order at
    18) (emphasis omitted). However, Crown Castle points out that Section 102(2)(iv) does
    not refer to operating equipment.
    Id. at 22.
    Instead, it focuses on whether a company
    furnishes mobile domestic cellular radio telecommunications service. 14
    Id. As such,
    Crown Castle asserts the PUC impermissibly added words to Section 102(2)(iv), which
    expanded the scope of the exclusion.
    Id. (explaining this
    Court has precluded reading
    words into a statute in order to change the meaning of the statute in Pa. Sch. Bds. Ass’n
    v. Commonwealth, Pub. Sch. Employees’ Ret. Bd., 
    863 A.2d 432
    , 439 (Pa. 2004)). Crown
    Castle posits that Section 102(2)(iv) reflects the legislature’s intent to “regulate different
    services differently, not on the basis of their equipment.”
    Id. at 28
    .
    Reading Sections 102(1)(vi) and 102(2)(iv), Crown Castle maintains it is a public
    utility that is not excluded because it does not furnish CMRS.
    Id. at 46.
    Crown Castle
    points out that it is undisputed that it meets the Section 102(1)(vi) definition of “public
    utility,” as the DAS Order recognized.
    Id. (citing DAS
    Order at 14). Turning to Section
    part of the WSPs’ networks, and third-party ownership does not affect the regulatory
    treatment of DAS operators.
    Id. at 9-11.
    14 Similarly, ExteNet contends the PUC incorrectly focused on whether DAS networks are
    used to furnish CMRS instead of on whether DAS operators actually furnish CMRS.
    ExteNet’s Brief at 20. ExteNet argues that a plain reading of Section 102 reveals a bright
    line test: if an entity is furnishing CMRS, it is not a public utility.
    Id. at 21.
    While
    acknowledging that DAS networks are used by WSPs to provide retail CMRS, it is the
    WSPs that actually furnish the CMRS service.
    Id. at 23
    -24. Accordingly, ExteNet
    maintains the DAS networks are not excluded from the definition of “public utility” because
    they do not furnish CMRS.
    Id. at 24.
    [J-81-2019] - 24
    102(2)(iv)’s exclusion of an entity that “furnishes mobile domestic cellular radio
    telecommunications service,” Crown Castle agrees with the PUC that the term is
    synonymous with the federally-defined CMRS.
    Id. Crown Castle
    contends it is not a
    CMRS because the FCC defines a “mobile service” as “a radio communication service
    carried on between mobile stations or receivers and land stations, and by mobile stations
    communicating among themselves,” and Crown Castle asserts it does not transmit data
    by radio but by wireline fiber optic cables.
    Id. at 47
    (citing 47 U.S.C. § 153(33); 47 C.F.R.
    § 20.3). Crown Castle argues that all radio transmissions are controlled and provided by
    its WSP customers and, therefore, it is not a CMRS.15
    Id. In its
    reply brief, the PUC maintains its interpretation did not add words to Section
    102(2)(vi). PUC’s Reply Brief at 21. The PUC argues that non-jurisdictional wireless
    service cannot be furnished without transporting RF signals, either to or from the end
    users’ mobile devices to the WSP.
    Id. at 22-23.
    According to the PUC, “the transport
    functionality   being   provided    to   consumers       is   the   furnishing   of   wireless
    telecommunications service to Pennsylvania consumers which, by statute, is excluded
    from the definition of jurisdictional telecommunications service.”
    Id. at 23
    (emphasis
    omitted). In the PUC’s view, the identity of the entity transporting RF signals is irrelevant,
    and the Commonwealth Court’s contrary conclusion produces an absurd result in
    contravention of 1 Pa.C.S. § 1922(1).
    Id. at 24.
    The PUC contends the record supports its view that DAS network operators furnish
    wireless telecommunications service.
    Id. at 13.
    It notes that the DAS operators’ technical
    15Crown Castle disagrees with the Municipal Parties’ interpretation of Section 102.
    Crown Castle’s Brief at 58. It notes the Code does not distinguish between wholesale
    CMRS and retail CMRS.
    Id. Further, Crown
    Castle explains wholesale CMRS refers to
    a WSP leasing its CMRS spectrum capacity to another company, and its DAS networks
    do not have the necessary spectrum to provide wholesale CMRS.
    Id. (citing Reply
    Comments of Crown Castle, 5/16/16, at 5-6).
    [J-81-2019] - 25
    descriptions of their networks acknowledge they transport over-the-air RF signals
    between mobile devices and a WSP’s closest aggregation point.
    Id. The PUC
    contends
    the ownership of the RF signals is irrelevant to its conclusion that DAS network operators
    transport those signals, which is a wireless telecommunications service.
    Id. at 14.
    We conclude that the Commonwealth Court’s interpretation of Section 102, holding
    DAS network operators meet the Section 102(1)(vi) definition of “public utility” and are not
    excluded from the definition by Section 102(2)(iv), was consistent with the plain language
    of the statute. Section 102(1)(vi) defines a “public utility” as:
    (1) Any person or corporation now or hereafter owning or
    operating in this Commonwealth equipment or facilities for:
    ...
    (vi) Conveying or transmitting messages or
    communications, except as set forth in paragraph
    (2)(iv), by telephone or telegraph or domestic public
    land mobile radio service including, but not limited to,
    point-to-point microwave radio service for the public for
    compensation.
    66 Pa.C.S. § 102(1)(vi). Significantly, there is no dispute that DAS network operators
    meet Section 102(1)(vi)’s definition of a “public utility” as corporations that own or operate
    equipment or facilities for conveying or transmitting communications. See DAS Order at
    14; Crown Castle’s Brief at 46. From the description of the DAS networks’ services, it is
    clear that their facilities transmit or transport messages from a node to a hub. Further,
    Section 102(1)(vi) clearly contemplates some wireless transmission services will qualify
    as public utilities because it includes “point-to-point microwave radio service,” which is a
    form of wireless transmission, as its only illustration of a public utility. Because we
    conclude that DAS network operators meet Section 102(1)(vi)’s definition of “public utility,”
    the question becomes whether Section 102(2)(iv) excludes DAS networks from the
    definition.
    [J-81-2019] - 26
    The exclusion in Section 102(2)(iv) provides: “(2) the term [“public utility”] does not
    include: . . . (iv) [a]ny person or corporation, not otherwise a public utility, who or which
    furnishes mobile domestic cellular radio telecommunications service.”            66 Pa.C.S.
    § 102(2)(iv). As the Commonwealth Court observed, the Section 102(2)(iv) exclusion
    does not contain the language “owning or operating . . . equipment or facilities.” Crown
    
    Castle, 188 A.3d at 632
    . However, the PUC’s interpretation adds this language to the
    exclusion.   The PUC’s argument to this Court is that the DAS network operators
    “indirectly” furnish CMRS because they operate equipment that facilitates another
    company’s ability to furnish CMRS.         PUC’s Brief at 42, 47.       We agree with the
    Commonwealth Court that adding these words to the exclusion is impermissible as it
    “expand[s] its application to entities that do not fall within the plain language of the
    statutory exclusion.” Crown 
    Castle, 188 A.3d at 632
    (relying on the principle of 1 Pa.C.S.
    § 1923(c) that words and phrases may not be added to a statute in a manner that affects
    its scope and operation). The plain language of the statute excludes only entities that
    actually provide mobile domestic cellular radio telecommunications service, or CMRS. As
    the federal regulations clarify, a CMRS is a for-profit service both available to the public,
    or a substantial portion of the public, and an “interconnected service.” 47 C.F.R. § 20.3
    (defining CMRS). An “interconnected service” is one “[t]hat is interconnected with the
    public switched network, or interconnected with the public switched network through an
    interconnected service provider, that gives subscribers the capability to communicate to
    or receive communication from all other users on the public switched network[.]”
    Id. (defining interconnected
    service). Here, the DAS network operators provide services to
    WSPs and do not have a business relationship with the WSP’s customers, i.e., the CMRS
    subscribers. As such, the DAS network operators do not provide an “interconnected
    service” because they do not “give[] subscribers the capability to communicate to or
    [J-81-2019] - 27
    receive communication from all other users on the public switched network[.]”
    Id. Therefore, the
    DAS network operators’ service in this case is not a CMRS under the
    federal regulations nor a synonymous “mobile domestic cellular radio telecommunications
    service” under Section 102(2)(iv). Section 102(2)(iv) does not exclude an entity that owns
    or operates equipment or facilities that assists another company in furnishing CMRS.
    Accordingly, the Commonwealth Court correctly determined that the PUC’s interpretation
    was inconsistent with the plain language of Section 102.
    Lastly, we examine whether the Commonwealth Court’s separate holding that DAS
    network operators were not excluded from the definition of “public utility” is inconsistent
    with its precedent and federal law. The PUC contends that the technology at issue in the
    Commonwealth Court’s Rural Telephone decision is distinguishable from the DAS
    network technology involved in this case. PUC’s Brief at 54. The PUC argues Rural
    Telephone’s conclusion that wireline backhaul transport service was a public utility cannot
    support a similar conclusion in this case that wireless RF transmissions over DAS
    networks from mobile devices to a hub also provide backhaul transport.
    Id. Moreover, the
    PUC maintains the Commonwealth Court’s opinion in this case produces an absurd
    result because its classification of a public utility is contingent on the ownership of the
    DAS network: all parties agree that a CMRS provider that builds its own DAS facilities to
    boost its network does not qualify as a public utility; however, if that CMRS provider leases
    a neutral host’s DAS network, it is a public utility according to the Commonwealth Court.
    Id. at 55-56.
    Looking to federal law, the PUC argues the FCC has classified DAS facilities as
    wireless while rejecting the argument that DAS networks are akin to backhaul transport
    services.
    Id. at 56.
    In support of its position, the PUC quotes the following portion of the
    FCC’s 2014 Wireless Infrastructure Order:
    [J-81-2019] - 28
    Some commenters argue that the shot clocks should not
    apply because some providers describe DAS and small-cell
    deployments as wireline, not wireless, facilities. The City of
    Eugene, Oregon, for example, argues that the Commission
    should not consider DAS a personal wireless service because
    one DAS provider has argued that its service is “no different
    from, and indeed competes directly with, the fiber-based
    backhaul/private line service provided by Incumbent Local
    Exchange Carriers.” This argument is not persuasive.
    Determining whether facilities are “personal wireless service
    facilities” subject to Section 332(c)(7) does not rest on a
    provider's characterization in another context; rather, the
    analysis turns simply on whether they are facilities used to
    provide personal wireless services.
    Id. (quoting 2
    014 Wireless Infrastructure Order, 29 FCC Rcd. at 12973, ¶ 271). With this
    analysis, the PUC states the FCC found that DAS facilities are “‘facilities for the provision
    of personal wireless services.’”
    Id. at 58
    (quoting 47 U.S.C. § 332(c)(7)(C)(ii)). The PUC
    further asserts the FCC’s analysis supports its determination that DAS network operators
    are furnishing CMRS because a DAS network’s antenna is a facility that provides
    personal wireless service.
    Id. at 60.
    Further, the PUC contends the Commonwealth
    Court erred in relying on decisions from Texas and California because the statutory
    definition of a public utility varies by jurisdiction, and the Commonwealth Court did not
    compare Section 102 to those jurisdictions’ statutes.
    Id. at 63.
    Crown Castle maintains the Commonwealth Court correctly concluded that the
    PUC’s DAS Order conflicts with its precedent and the FCC’s precedent. Crown Castle’s
    Brief at 38. Analyzing Rural Telephone, Crown Castle reads its holding as “a provider of
    telecommunications service does not assume the regulatory status of its customers.”
    Id. Instead of
    focusing on the customer’s service, Crown Castle explains Rural Telephone
    as focusing on the provider’s service.
    Id. at 39
    . 
    In Rural Telephone, according to Crown
    Castle, the Commonwealth Court found that providing fiber optic transport services to
    ISPs did not also make the company a non-jurisdictional “‘wholesale ISP.’”
    Id. at 38
    -39.
    Applying Rural Telephone to this case, Crown Castle emphasizes that its DAS network
    [J-81-2019] - 29
    service is distinct from its WSP customers’ service.
    Id. at 39
    (arguing “the key distinction
    the PUC repeatedly ignores is that DAS network operators offer a service to CMRS
    providers that is separate and distinct from the service offered by those CMRS providers.”
    (emphasis in original)). In support of this point, Crown Castle notes that it does not have
    relationships with end-user CMRS consumers and it cannot replace the CMRS that its
    WSP customers provide to end-users.
    Id. “Although Crown
    Castle’s DAS networks, on
    some level, facilitate the provision of CMRS service by others, there will always have to
    be a separate CMRS service provider furnishing the service to the end users[.]”
    Id. at 39
    -
    40. Accordingly, Crown Castle concludes the Commonwealth Court properly applied the
    principles of Rural Telephone to this case.
    Id. at 42.
    Next, Crown Castle agrees with the Commonwealth Court’s analysis of the FCC’s
    2014 Wireless Infrastructure Order.
    Id. Crown Castle
    maintains the FCC did not find
    DAS network operators provide “personal wireless service,” only that when a provider of
    personal wireless service uses DAS facilities those DAS facilities are classified as
    “personal wireless service facilities.”
    Id. Crown Castle
    explains the PUC’s error is not
    distinguishing between facilities and services.16
    Id. at 43.
    Because the Commonwealth
    Court drew the same distinction as the FCC, Crown Castle urges this Court to affirm the
    Commonwealth Court.
    Id. at 43.
    The PUC, in its reply brief, reiterates that the terrestrial, wireline wholesale
    backhaul transport of ISP traffic involved in Rural Telephone is distinguishable from the
    over-the-air RF signal transmission at issue in this case. PUC’s Reply Brief at 15-19.
    16ExteNet states that “for an entity to provide CMRS, the entity must be licensed by the
    FCC in accordance with 47 C.F.R. § 20.9 and must possess wireless spectrum . . . .
    Without such a license from the FCC, and without wireless spectrum, it is impossible for
    DAS operators to furnish CMRS.” ExteNet’s Brief at 30.
    [J-81-2019] - 30
    Here, we conclude the Commonwealth Court’s finding that DAS network operators
    are public utilities is consistent with the Commonwealth Court’s precedent and federal
    law. First, the Commonwealth Court’s decision in this case is supported by its prior
    decision in Rural Telephone. In Rural Telephone, the Commonwealth Court affirmed the
    PUC’s decision to certify Core Communications as a public utility providing
    telecommunications services. Rural Tel., 941 A2d at 752. Core’s services connected its
    Internet Service Provider (ISP) customers to the Public Switched Telephone Network.
    Id. at 753.
    The objectors to Core’s application argued, in part, that Core was a wholesale
    ISP, not a telecommunications service.
    Id. at 753-54.
    The Commonwealth Court rejected
    this argument, reasoning that the Code broadly defines “public utility,” and “internet
    service is an information service, but [] the transmission path needed to provide that
    internet service is a telecommunication[s] service[.]”
    Id. at 758-59.
    Further, the court
    explained that Core facilitated the ISPs’ service of dial-up internet access.
    Id. at 760
    n.12.
    We recognize that the technology the DAS network operators use in this case
    differs from the technology involved in Rural Telephone. However, we do not find that
    difference is controlling. Instead, the service the DAS network operators provide to their
    WSP customers is analogous to the service Core offered to its ISP customers, which the
    Commonwealth Court concluded was a public utility. Rural 
    Tel., 941 A.2d at 760
    . Just
    as Core “accept[ed] computer dial-up calls destined for the internet” and “change[d] the
    content of the call and grooms it to allow an end-user’s computer to web browse or receive
    emails over the internet[,]” the DAS networks in this case receive RF signals from mobile
    devices, convert the RF signals to optical signals, and transport the signal to the WSPs’
    networks.
    Id. at 753-54.
    Like Core’s transmission service facilitated the ISPs’ dial-up
    internet service, the DAS networks’ transportation service in this case facilitate the WSPs’
    CMRS. We agree with the Commonwealth Court that the facilitation of a non-jurisdictional
    [J-81-2019] - 31
    service is not equivalent to the actual furnishing of that non-jurisdictional service. Crown
    
    Castle, 188 A.3d at 635
    (explaining “Rural Telephone[] recognized that the Code treats
    transmission services as telecommunications services that fall within the [PUC’s]
    jurisdiction even if they transmit non-jurisdictional services[.]”). Accordingly, we find Rural
    Telephone’s conclusion that Core was properly certified as a public utility is consistent
    with the Commonwealth Court’s reasoning in this case that the DAS networks are public
    utilities.
    Second, the FCC’s treatment of DAS networks confirms the Commonwealth
    Court’s conclusion that DAS network operators are public utilities and are not furnishing
    CMRS. The FCC has consistently classified DAS networks as wireless infrastructure
    facilities. See, e.g., In re Comm’ns Marketplace Report, 
    2018 WL 6839365
    , at *16 (FCC
    2018) (stating “wireless infrastructure also includes distributed antenna systems (DAS)
    and small cells.”). The FCC’s 2014 Wireless Infrastructure Order states DAS networks
    are “personal wireless service facilities,” which is a term of art defined as “facilities for the
    provision of personal wireless services.” See 2014 Wireless Infrastructure Order, 29 FCC
    Rcd. at 12973 ¶ 271); 47 U.S.C. § 332(c)(7)(C)(ii). The term “personal wireless services”
    is separately defined as “commercial mobile services, unlicensed wireless services, and
    common carrier wireless exchange access services.” 47 U.S.C. § 332(c)(7)(C)(i). Thus,
    the FCC and the United States Code recognize that facilities used to provide personal
    wireless services are distinct from the actual provision of those services. Further, the
    FCC issued a 2018 Communications Marketplace Report, which discussed “facilities-
    based mobile wireless service providers,” including AT&T, Sprint, T-Mobile, and Verizon
    Wireless, separately from “wireless infrastructure facilities,” which includes “towers and
    other tall structures, such as lattice towers, guyed towers, monopoles, rooftops, water
    towers, and steeples, [and] distributed antenna systems (DAS) and small cells.” In re
    [J-81-2019] - 32
    Comm’ns Marketplace Report, 
    2018 WL 6839365
    , at *3, *16. As discussed above, the
    third-party DAS network providers here operate wireless infrastructure facilities that do
    not provide personal wireless service even though the DAS networks ultimately increase
    the coverage of their WSP customers’ networks.                Therefore, we conclude the
    Commonwealth Court’s conclusion that DAS networks do not provide personal wireless
    services is supported by FCC precedent.17
    In summary, we agree with the Commonwealth Court that DAS network operators
    do not provide CMRS because DAS network operators “own no spectrum, need no phone
    numbers, and their contractual relationship is solely with the WSPs, not with the retail cell
    phone user. . . . [T]he DAS network operator has no control over the generation of that
    signal [that it transports for the WSPs].” Crown 
    Castle, 188 A.3d at 633
    . Accordingly, we
    conclude that DAS network operators do not furnish CMRS and are not excluded from
    the definition of public utility by Section 102(2)(iv).
    For these reasons, the decision of the Commonwealth Court is affirmed. We
    conclude the Commonwealth Court did not err in holding that the PUC’s interpretation of
    a clear and unambiguous statutory provision was not entitled to deference. Further, the
    Commonwealth Court properly concluded that DAS network service meets the definition
    17 This conclusion is also consistent with the decisions of the Texas Public Utility
    Commission and the California Public Utilities Commission. Although the PUC points out
    the statutory definition of public utility varies by jurisdiction, it does not argue there are
    any meaningful differences between the Texas or California statutes and the Code.
    Further, although the definition of public utility may differ, those states’ descriptions of the
    services offered by DAS networks is consistent with our understanding and supports our
    conclusion that DAS networks do not furnish CMRS. See City of Houston, 
    2017 WL 2079683
    , at *4-5; County of S.F., 
    2006 WL 151886
    , at *3-4.
    [J-81-2019] - 33
    of “public utility” and is not excluded from that definition as it does not furnish CMRS
    service.
    Chief Justice Saylor and Justices Baer, Todd, Donohue, Dougherty and Wecht join the
    opinion.
    Justice Wecht files a concurring opinion.
    [J-81-2019] - 34