Allen v. Commissioner of Revenue Services , 324 Conn. 292 ( 2017 )


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    JEFFERSON ALLEN ET AL. v. COMMISSIONER
    OF REVENUE SERVICES
    (SC 19567)
    Palmer, Zarella, Eveleigh, McDonald and Robinson, Js.
    Argued October 13—officially released December 28, 2016*
    Daniel J. Krisch, with whom was Leslie E. Grodd,
    for the appellants (plaintiffs).
    Patrick T. Ring, assistant attorney general, with
    whom were Matthew J. Budzik, assistant attorney gen-
    eral, and, on the brief, George Jepsen, attorney general,
    for the appellee (defendant).
    Opinion
    EVELEIGH, J. The plaintiffs, Jefferson Allen and
    Evita Allen, appeal1 from the trial court’s award of sum-
    mary judgment upholding the decision of the defendant,
    the Commissioner of Revenue Services, denying their
    request for a tax refund for the taxable years 2002, 2006,
    and 2007. In this appeal, the plaintiffs claim that the trial
    court improperly concluded that: (1) it lacked subject
    matter jurisdiction with respect to the plaintiffs’ claim
    for a refund for the taxable year 2002 on the basis of
    the three year limitation period to file an income tax
    refund pursuant to General Statutes § 12-732 (a); (2)
    § 12-711(b)-18 of the Regulations of Connecticut State
    Agencies permitted the defendant to tax the plaintiffs’
    income derived from the exercise of options because
    the options were granted as compensation for per-
    forming services within the state; and (3) it is constitu-
    tional to impose a tax on income derived from the
    exercise of nonqualified stock options2 by a nonresident
    who was granted the options as compensation for per-
    forming services within the state. We disagree with each
    of the plaintiffs claims. Because the form of the trial
    court’s judgment with respect to the plaintiffs’ claim
    relating to the taxable year 2002 was improper, we
    reverse the trial court’s award of summary judgment
    with respect to that taxable year and remand the case
    with direction to render judgment dismissing that claim.
    We affirm the judgment of the trial court in all other
    respects.
    The following undisputed facts and procedural his-
    tory are relevant to this appeal. From 1990 to 2001,
    Jefferson Allen3 served as president and chief financial
    officer of Tosco, Inc. (Tosco). During this period, Allen
    was domiciled in and performed services solely within
    Connecticut. As part of his compensation while
    employed with Tosco, he was awarded nonqualified
    stock options.4 In 2002, while the plaintiffs were residing
    outside of Connecticut, Allen exercised the options he
    was granted by Tosco, resulting in $7,633,027 of income.
    The plaintiffs filed a Connecticut nonresident and part
    year resident income tax return reporting income from
    exercising these options in 2002 and paid the applica-
    ble tax.
    After a period of nonresidency from 2002 to 2004,
    the plaintiffs returned to Connecticut in 2005. From
    January 1, 2005 to August 31, 2005, Allen served as the
    chief executive officer of Premcor, Inc. (Premcor), and
    performed services solely within Connecticut. As part
    of his compensation for performing services for
    Premcor, Allen was awarded nonqualified stock
    options.5 The plaintiffs again moved out of Connecticut
    and resided outside the state in 2006 and 2007. In 2006,
    Allen exercised certain stock options he had earned
    performing services for Premcor, resulting in
    $43,360,812 of income. In 2007, Allen again exercised
    certain stock options that were earned as compensation
    for performing services for Premcor, resulting in
    $2,247,745 of income. The plaintiffs timely filed their
    tax returns and paid the applicable tax for the taxable
    years 2007 and 2008.
    In October, 2009, the plaintiffs filed amended returns
    for the taxable years 2002, 2006, and 2007, claiming
    refunds for the income tax that the plaintiffs had paid
    in each of those years. The plaintiffs’ claims for a refund
    were denied. In 2013, the Appellate Division of the
    Department of Revenue Services affirmed the denial.
    The defendant thereafter issued a final determination
    denying the plaintiffs’ claims for refunds.
    Pursuant to General Statutes § 12-730,6 the plaintiffs
    timely filed an appeal from the defendant’s determina-
    tion in the Superior Court. The parties filed cross
    motions for summary judgment on stipulated facts,
    which the trial court granted in favor of the defendant.
    This appeal followed. Additional facts and procedural
    history will be set forth as necessary.
    I
    First we address the issue of whether the trial court
    properly concluded that it lacked subject matter juris-
    diction regarding the plaintiffs’ claim for a refund for
    the taxable year 2002 because they filed their claim
    after the lapse of the three year statute of limitations for
    such a claim pursuant to § 12-732 (a) (1). The plaintiffs
    concede that their request for a refund was filed after
    the lapse of the three year period.7 Nevertheless, relying
    principally upon Williams v. Commission on Human
    Rights & Opportunities, 
    257 Conn. 258
    , 
    777 A.2d 645
    (2001), the plaintiffs argue that the three year statute
    of limitations is not jurisdictional and, therefore, should
    be equitably tolled. In response, the defendant claims
    that the statute of limitations, because it forms part of
    a statutory scheme that waives sovereign immunity, is
    jurisdictional and should not be tolled. We agree with
    the defendant.
    The following additional facts and procedural history
    are relevant to the resolution of this issue. The defen-
    dant commenced an audit of the plaintiffs’ taxable year
    2005 income tax return in July 2006. In March 2007, the
    defendant expanded the audit to include the taxable
    years 2001 through 2004. Around this same time, the
    plaintiffs filed a Connecticut nonresident and part year
    resident return reporting income from 2002 and paid
    the applicable tax. In October 2009, the plaintiffs filed
    amended returns for the taxable year 2002, claiming a
    refund for the income tax that the plaintiffs had paid.
    In October, 2012, the plaintiffs claim for a refund for
    the taxable year 2002 was disallowed. The defendant
    denied the request for a refund on the grounds that,
    pursuant to § 12-732 (a) (1),8 the claim for a refund was
    untimely. The trial court affirmed the determination of
    the defendant, concluding that it lacked subject matter
    jurisdiction to consider the plaintiffs’ claim.
    Our standard of review with respect to a trial court
    determination regarding subject matter jurisdiction is
    well settled. ‘‘A determination regarding a trial court’s
    subject matter jurisdiction is a question of law. When
    . . . the trial court draws conclusions of law, our
    review is plenary and we must decide whether its con-
    clusions are legally and logically correct and find sup-
    port in the facts that appear in the record.’’ (Internal
    quotation marks omitted.) Citibank, N.A. v. Lindland,
    
    310 Conn. 147
    , 161, 
    75 A.3d 651
    (2013).
    ‘‘The principle that the state cannot be sued without
    its consent, or sovereign immunity, is well established
    under our case law. . . . It has deep roots in this state
    and our legal system in general, finding its origin in
    ancient common law. . . . Not only have we recog-
    nized the state’s immunity as an entity, but [w]e have
    also recognized that because the state can act only
    through its officers and agents, a suit against a state
    officer concerning a matter in which the officer repre-
    sents the state is, in effect, against the state.’’ (Internal
    quotation marks omitted.) DaimlerChrysler Corp. v.
    Law, 
    284 Conn. 701
    , 711, 
    937 A.2d 675
    (2007). The princi-
    ple of sovereign immunity implicates the subject matter
    jurisdiction of the court. Id.; see also Giannoni v. Com-
    missioner of Transportation, 
    322 Conn. 344
    , 349, 
    141 A.3d 784
    (2016) (‘‘sovereign immunity implicates [a
    court’s] subject matter jurisdiction’’ [internal quotation
    marks omitted]); Chief Information Officer v. Comput-
    ers Plus Center, Inc., 
    310 Conn. 60
    , 79, 
    74 A.3d 1242
    (2013) (same); Nelson v. Dettmer, 
    305 Conn. 654
    , 660,
    
    46 A.3d 916
    (2012) (same); Miller v. Egan, 
    265 Conn. 301
    , 313, 
    828 A.2d 549
    (2003) (same).9
    The principles governing statutory waivers of sover-
    eign immunity are well established. ‘‘[A] litigant that
    seeks to overcome the presumption of sovereign immu-
    nity [pursuant to a statutory waiver] must show that
    . . . the legislature, either expressly or by force of a
    necessary implication, statutorily waived the state’s
    sovereign immunity . . . . In making this determina-
    tion, [a court shall be guided by] the well established
    principle that statutes in derogation of sovereign immu-
    nity should be strictly construed. . . . [When] there is
    any doubt about their meaning or intent they are given
    the effect which makes the least rather than the most
    change in sovereign immunity. . . . Furthermore,
    because such statutes are in derogation of the common
    law, [a]ny statutory waiver of immunity must be nar-
    rowly construed . . . and its scope must be confined
    strictly to the extent the statute provides.’’ (Citation
    omitted; internal quotation marks omitted.) Housatonic
    Railroad Co. v. Commissioner of Revenue Services,
    
    301 Conn. 268
    , 288–89, 
    21 A.3d 759
    (2011). ‘‘Whether the
    legislature has waived the state’s sovereign immunity
    raises a question of statutory interpretation.’’ 
    Id. As such,
    we are guided by the principles of General Stat-
    utes § 1-2z.
    A tax appeal is a two step process. With respect to
    a claim for a refund for income taxes, the plaintiff must
    first timely file a claim with the defendant. General
    Statutes § 12-732 (a) (1); see Federal Deposit Ins. Corp.
    v. Crystal, 
    251 Conn. 748
    , 759, 
    741 A.2d 956
    (1999).
    Section 12-732 (a) (1), in establishing an administrative
    claim for a refund, is not itself an express or implicit
    waiver of sovereign immunity. See DaimlerChrysler
    Corp. v. 
    Law, supra
    , 
    284 Conn. 715
    (noting that sales
    and use tax refund statute, General Statutes § 12-425
    is not waiver of sovereign immunity). The applicable
    appeal statute, § 12-730, does, however, statutorily
    waive sovereign immunity. 
    Id. Compliance with
    the
    refund statute is a condition precedent to availing one-
    self of the limited statutory waiver of sovereign immu-
    nity provided by the appeal statute. See Federal Deposit
    Ins. Corp. v. 
    Crystal, supra
    , 760 (noting that corporate
    tax refund statute ‘‘establishes an administrative
    request for a refund as the prescribed avenue of relief
    that the [plaintiff was] required to follow in order to take
    advantage of the state’s limited waiver of its sovereign
    immunity’’ [internal quotation marks omitted]).
    Our firmly rooted principles of sovereign immunity
    demand strict compliance with the procedures set forth
    in the relevant statutes. In determining the scope of the
    statutory waiver of sovereign immunity, we are mindful
    that the underlying refund claim may impose ‘‘a mone-
    tary obligation on the sovereign, and thus it is essential
    for its requirements to be satisfied.’’ (Internal quotation
    marks omitted.) Housatonic Railroad Co. v. Commis-
    sioner of Revenue 
    Services, supra
    , 
    301 Conn. 289
    , quot-
    ing DaimlerChrysler Corp. v. 
    Law, supra
    , 
    284 Conn. 716
    . In DaimlerChrysler Corp., we reasoned that the
    plaintiff had failed to fall within the ambit of the relevant
    appeal statute because, inter alia, the plaintiff invoked
    the relevant sales and use refund statute, § 12-425,
    ‘‘independent of the statutory prerequisites for its appli-
    cation . . . and without the ability to satisfy those pre-
    requisites.’’ DaimlerChrysler Corp. v. 
    Law, supra
    ,
    716–17.10 Accordingly, the plaintiff in that case did ‘‘not
    fall within the class of persons entitled to a refund
    pursuant to § 12-425 for whom the legislature waived
    sovereign immunity.’’ 
    Id., 717. We
    have also addressed this issue in the context of
    corporate taxes in Federal Deposit Ins. Corp. v. 
    Crystal, supra
    , 
    251 Conn. 759
    –60. In that case, we staed: ‘‘There
    is no question . . . that if [the plaintiff] were seeking
    . . . a refund of . . . corporation business taxes that
    the banks11 had allegedly overpaid for the years in ques-
    tion . . . failure to follow the procedures set forth in
    [General Statutes] § 12-225 (b) (1)12 would deprive the
    court of subject matter jurisdiction over such a claim.’’
    (Footnotes added.) 
    Id., 759. We
    noted that the statute
    ‘‘establishes an administrative request for a refund as
    the prescribed avenue of relief that the [plaintiff was]
    required to follow in order to take advantage of the
    state’s limited waiver of its sovereign immunity.’’ 
    Id., 750. ‘‘We
    have frequently held that where a statute has
    established a procedure to redress a particular wrong
    a person must follow the specified remedy and may
    not institute a proceeding that might have been permis-
    sible in the absence of such a statutory procedure. Nor-
    wich v. Lebanon, 
    200 Conn. 697
    , 708, 
    513 A.2d 77
    (1986).
    When an adequate administrative remedy exists at law,
    a litigant must exhaust it before the Superior Court will
    obtain jurisdiction over an independent action on the
    matter. . . . Owner-Operators Independent Drivers
    Assn. of America v. State, 
    209 Conn. 679
    , 686–87, 
    553 A.2d 1104
    (1989). Thus, intertwined principles of sover-
    eign immunity and exhaustion of administrative reme-
    dies would require that any claim for a refund of taxes
    allegedly overpaid . . . be preceded by a timely
    amended return and claim for such a refund pursuant to
    § 12-225. 
    Id., 686.’’ (Internal
    quotation marks omitted.)
    Federal Deposit Ins. Corp. v. 
    Crystal, supra
    , 760. While
    the statute discussed in Federal Deposit Ins. Corp. v.
    
    Crystal, supra
    , 760, § 12-225 (b) (1), implicated corpo-
    rate taxes, both §§ 12-225 (b) (1) and 12-732 (a) (1)
    permit claims for refunds within only a prescribed three
    year period. In addition, both statutes provide that
    ‘‘[f]ailure to file a claim within the time prescribed in
    this section constitutes a waiver of any demand against
    the state on account of overpayment.’’ General Statutes
    §§ 12-225 (b) (1) and 12-732 (a) (1).
    In short, the refund statute and the appeal statute
    set forth precise procedures a taxpayer must follow in
    order to invoke the jurisdiction of the trial court to
    review their claim.13 In the present case, the plaintiffs
    failed to comply with the requirements of § 12-732 (a)
    (1). Because the plaintiffs failed to comply with the
    statutory prerequisites for their administrative refund
    claim for the 2002 taxable year, the trial court was
    without subject matter jurisdiction to consider that
    claim.
    II
    We next address the plaintiffs’ claims with respect
    to taxable years 2006 and 2007. The plaintiffs claim that
    the income derived from the exercise of the Premcor
    options by Allen in 2006 and 2007 is not properly taxable
    under § 12-711(b)-18 (a) of the regulations. Specifically,
    the plaintiffs claim that § 12-711(b)-18 (a) requires a
    taxpayer to be performing services in Connecticut at
    the time of exercising the options, as well as at the
    time the options were awarded, in order for the income
    derived therefrom to be subject to taxation. The defen-
    dant contends that § 12-711(b)-18 (a) requires only that
    the taxpayer have been performing services in Connect-
    icut at the time the options were granted. The plaintiffs
    further claim that taxation of the income derived from
    the exercise of the Premcor options violates the due
    process clause of the federal constitution. We disagree
    with the plaintiffs.
    The following additional facts and procedural history
    are relevant to the resolution of these issues. In October
    2009, the plaintiffs filed amended returns for the taxable
    years 2006 and 2007, claiming refunds for the income
    tax that the plaintiffs had paid for both of those years.
    The defendant denied the plaintiffs’ claims for a refund
    for taxable years 2006 and 2007 on the grounds that
    the Premcor options were granted as compensation for
    services Allen performed in Connecticut and, therefore,
    the income was properly reported as income from Con-
    necticut sources. In 2013, the Appellate Division of the
    Department of Revenue Services affirmed the denial.
    The defendant thereafter issued a final determination
    denying the plaintiffs’ claims for refunds. The plaintiffs
    timely appealed to the trial court, which affirmed the
    decision of the defendant and rejected the plaintiffs’
    constitutional claim.
    A
    Our resolution of this issue first requires a discussion
    of the legal framework applicable to the state and fed-
    eral taxation of nonqualified stock options. General
    Statutes § 12-700 (b) authorizes the taxation of income
    ‘‘derived from or connected with sources within this
    state of each nonresident . . . .’’ The tax upon nonresi-
    dents is determined by the application of a formula that
    includes the nonresident’s ‘‘Connecticut adjusted gross
    income derived from or connected with sources within
    this state . . . .’’ General Statutes § 12-700 (b). While
    the terms ‘‘adjusted gross income’’ and ‘‘Connecticut
    adjusted gross income’’ are defined by statute; see Gen-
    eral Statutes § 12-701 (a) (19) and (20);14 the legislature
    delegated to the defendant ability to define the term
    ‘‘ ‘derived from or connected with sources within this
    state’ . . . .’’ General Statutes § 12-701 (c). Pursuant
    to this statutory authority, the defendant has promul-
    gated a regulation that addresses nonqualified stock
    options that provides in relevant part as follows: ‘‘Con-
    necticut adjusted gross income derived from or con-
    nected with sources within this state includes . . .
    income recognized under section 83 of the Internal Rev-
    enue Code in connection with a nonqualified stock
    option if, during the period beginning with the first day
    of the taxable year of the optionee during which such
    option was granted and ending with the last day of the
    taxable year of the optionee during which such option
    was exercised (or, if the option has a readily ascertain-
    able fair market value, as defined in 26 C.F.R. § 1.83-
    7[b], at the time of grant, the taxable year during which
    such option was granted), the optionee was performing
    services within Connecticut . . . .’’ Regs., Conn. State
    Agencies § 12-711(b)-18 (a).
    Because § 12-711(b)-18 of the regulations incorpo-
    rates § 83 of the Internal Revenue Code, we look to
    federal law for further guidance on the taxation of non-
    qualified stock options.15 Under the federal law, the
    transfer of property in exchange for the performance
    of services is generally subject to taxation. See 26 U.S.C.
    § 83 (a). Not all transfers of property in exchange for
    the performance of services are taxable events at the
    time of transfer. One such transfer is the transfer of
    stock options without a readily ascertainable fair mar-
    ket value. 26 U.S.C. § 83 (e) (3); see Commissioner of
    Internal Revenue v. LoBue, 
    351 U.S. 243
    , 249, 
    76 S. Ct. 800
    , 
    100 L. Ed. 1142
    (1956). This, however, is by no
    means a tax shelter. Taxation is merely deferred until
    the taxpayer exercises the option. 26 C.F.R. § 1.83-7
    (a).16 Indeed, ‘‘the uniform Treasury practice since 1923
    has been to measure the compensation to employees
    given stock options subject to contingencies of this sort
    by the difference between the option price and the
    market value of the shares at the time the option is
    exercised.’’ Commissioner of Internal Revenue v.
    
    LoBue, supra
    , 249. ‘‘[E]ver since LoBue it has been
    unquestioned that, except for statutory alleviation,
    when a compensatory option has no ascertainable mar-
    ket value as of the time of grant, the receipt of fruits
    of the option when exercised, fixes the time and mea-
    sures the value of the economic benefit intended to
    be, and now, conferred upon the employee.’’ Rank v.
    United States, 
    345 F.2d 337
    , 343 (5th Cir. 1965); see
    also Sutardja v. United States, 
    109 Fed. Cl. 358
    , 363
    (2013) (‘‘[T]he Supreme Court established half a century
    ago that, absent certain circumstances, the mere grant
    of employee stock options is not a taxable event. . . .
    A taxable event occurs only when the option is exer-
    cised, resulting in a sale of shares to the employee, the
    net value of which is immediately taxable.’’ [Citations
    omitted.]).
    B
    With that background in mind, we now address the
    proper construction of § 12-711(b)-18 (a) of the regula-
    tions. The plaintiffs claim that § 12-711(b)-18 (a)
    requires a taxpayer to be performing services in Con-
    necticut at the time of exercising the options, as well
    as at the time the options were awarded, in order for
    the income derived therefrom to be subject to taxation.
    The defendant contends that § 12-711(b)-18 (a) requires
    only that the taxpayer have been performing services
    in Connecticut at the time the options were granted.
    We agree with the defendant.
    ‘‘Administrative regulations have the ‘full force and
    effect’ of statutory law and are interpreted using the
    same process as statutory construction . . . .’’ (Inter-
    nal quotation marks omitted.) Sarrazin v. Coastal, Inc.,
    
    311 Conn. 581
    , 603, 
    89 A.3d 841
    (2014); see also Alexan-
    dre v. Commissioner of Revenue Services, 
    300 Conn. 566
    , 578, 
    22 A.3d 518
    (2011); Hasychak v. Zoning Board
    of Appeals, 
    296 Conn. 434
    , 443, 
    994 A.2d 1270
    (2010).
    Accordingly, ‘‘[i]n conducting this analysis, we are
    guided by the well established principle that [i]ssues
    of statutory construction raise questions of law, over
    which we exercise plenary review. . . . We are also
    guided by the plain meaning rule for statutory construc-
    tion. See General Statutes § 1-2z.’’ (Internal quotation
    marks omitted.) LaFrance v. Lodmell, 
    322 Conn. 828
    ,
    833–34, 
    144 A.3d 373
    (2016).
    ‘‘When construing a statute, [the court’s] fundamental
    objective is to ascertain and give effect to the apparent
    intent of the legislature. . . . In other words, [the
    court] seek[s] to determine, in a reasoned manner, the
    meaning of the statutory language as applied to the
    facts of [the] case, including the question of whether
    the language actually does apply. . . . In seeking to
    determine that meaning . . . § 1-2z directs [the court]
    first to consider the text of the statute itself and its
    relationship to other statutes. If, after examining such
    text and considering such relationship, the meaning of
    such text is plain and unambiguous and does not yield
    absurd or unworkable results, extratextual evidence of
    the meaning of the statute shall not be considered. . . .
    The test to determine ambiguity is whether the statute,
    when read in context, is susceptible to more than one
    reasonable interpretation.’’ (Citation omitted; internal
    quotation marks omitted.) Price v. Independent Party
    of CT—State Central, 
    323 Conn. 529
    , 539–40, 
    147 A.3d 529
    (2016).
    The starting point in the analysis is the language of
    § 12-711(b)-18 (a) of the regulations itself, which is set
    forth in part II A of this opinion. The plaintiffs claim
    that ambiguity lies in the meaning of the word ‘‘during,’’
    as used in § 12-711(b)-18 (a) of the regulations. Because
    that term is not defined by regulation or statute, we
    look to the dictionary for guidance. General Statutes
    § 1-1 (a). ‘‘[D]uring’’ is defined as both ‘‘throughout the
    continuance or course of’’ and ‘‘at some point in the
    course of . . . .’’ Webster’s Third New International
    Dictionary (1961). By applying the first definition, § 12-
    711(b)-18 (a) of the regulations would subject option
    income to taxation only if the taxpayer had been per-
    forming services in the state throughout the period in
    which the options were granted and subsequently exer-
    cised. By applying the second definition, § 12-711(b)-18
    (a) of the regulations would require that the nonresident
    taxpayer only have been performing services in the
    state at the time the options were awarded. The parties
    disagree as to which definition of ‘‘during’’ is proper. As
    we have repeatedly noted, however, statutory language
    ‘‘does not become ambiguous merely because the par-
    ties contend for different meanings.’’ (Internal quota-
    tion marks omitted.) Glastonbury Co. v. Gillies, 
    209 Conn. 175
    , 180, 
    550 A.2d 8
    (1988); see also Luttrell v.
    Luttrell, 
    184 Conn. 307
    , 310–11, 
    439 A.2d 981
    (1981);
    Caldor, Inc. v. Heffernan, 
    183 Conn. 566
    , 571, 
    440 A.2d 767
    (1981). We conclude that § 12-711(b)-18 (a) of the
    regulations is unambiguous because application of the
    second definition of ‘‘during’’ leads to the only reason-
    able construction. See Planning & Zoning Commis-
    sion v. Freedom of Information Commission, 
    316 Conn. 1
    , 12–13, 
    110 A.3d 419
    (2015) (‘‘it is a basic tenet
    of statutory construction that [w]e construe a statute
    as a whole and read its subsections concurrently in
    order to reach a reasonable overall interpretation’’
    [internal quotation marks omitted]).17
    Reading the term ‘‘during’’ in § 12-711(b)-18 (a) of
    the regulations to mean ‘‘throughout the continuance
    or course of’’; Webster’s Third New International Dic-
    
    tionary, supra
    ; is unreasonable for two reasons. First,
    this definition of ‘‘during’’ would create disharmony
    within the regulation itself. It is axiomatic that the legis-
    lature is presumed to have enacted a consistent and
    harmonious body of law. See LaFrance v. 
    Lodmell, supra
    , 
    322 Conn. 837
    . It is a ‘‘cardinal’’ maxim of statu-
    tory interpretation ‘‘that statutes shall not be construed
    to render any sentence, clause, or phrase superfluous
    or meaningless.’’ (Internal quotation marks omitted.)
    Commissioner of Public Safety v. Freedom of Informa-
    tion Commission, 
    312 Conn. 513
    , 543, 
    93 A.3d 1142
    (2014); Connecticut Podiatric Medical Assn. v. Health
    Net of Connecticut, Inc., 
    302 Conn. 464
    , 474, 
    28 A.3d 958
    (2011) (‘‘[I]t is a basic tenet of statutory construc-
    tion that the legislature [does] not intend to enact mean-
    ingless provisions. . . . [I]n construing statutes, we
    presume that there is a purpose behind every sentence,
    clause, or phrase used in an act and that no part of a
    statute is superfluous.’’ [Internal quotation marks
    omitted.]).
    Subsection (a) of § 12-711(b)-18 of the regulations
    defines the income derived from stock options as
    includable in Connecticut adjusted gross income, sub-
    ject to certain conditions. This subsection contains pro-
    viso language, ‘‘to the extent provided in this section,’’
    which indicates that other parts of the regulation further
    delineate how much of the income is includable in Con-
    necticut adjusted gross income. Subsection (b) of § 12-
    711(b)-18 requires the application of a formula to deter-
    mine how much income is includable in Connecticut
    gross income for nonresident taxpayers who perform
    services wholly within Connecticut. Subsection (c) of
    § 12-711(b)-18 requires the application of a different
    formula to determine how much income is includable
    in Connecticut gross income for nonresident taxpayers
    who perform services partly within and partly without
    the state of Connecticut.18 If subsection (a) were con-
    strued to require the taxpayer to be performing services
    within Connecticut throughout the course of the rele-
    vant time period, then the option income of a taxpayer
    who performs services partially within and partially
    without Connecticut would, by definition, not be includ-
    able in Connecticut adjusted income. Consequently, the
    formula set forth in subsection (c) to be applied to
    such a taxpayer would be superfluous because such
    taxpayer’s option income would not be includable in
    gross income pursuant to subsection (a). Likewise,
    under the plaintiffs’ construction, there would be no
    need to distinguish between taxpayers performing ser-
    vices wholly in Connecticut and taxpayers performing
    services partially within and partially without Connecti-
    cut because the option income of the latter would not
    be includable in Connecticut adjusted gross income
    pursuant to subsection (a).
    Second, the plaintiffs’ proposed construction of the
    relevant regulation would lead to bizarre results. It is
    well established that ‘‘those who promulgate statutes
    . . . do not intend . . . absurd consequences or
    bizarre results.’’ (Internal quotation marks omitted.)
    State v. Courchesne, 
    296 Conn. 622
    , 710, 
    998 A.2d 1
    (2010). According to the plaintiffs’ proposed construc-
    tion, option income is includable in Connecticut
    adjusted gross income only if the optionee was per-
    forming services within Connecticut throughout the
    course of ‘‘the period beginning with the first day of
    the taxable year of the optionee during which such
    option was granted and ending with the last day of the
    taxable year of the optionee during which such option
    was exercised . . . .’’ Regs., Conn. State Agencies § 12-
    711(b)-18 (a). The practical consequence of this con-
    struction is that a taxpayer may commence performing
    services after the first day of the taxable year in which
    the options are granted or cease performing services
    before the last day of the taxable year in which the
    options are exercised in order to escape taxation of
    the option income. By way of example, if a taxpayer
    commences performing services in Connecticut on Feb-
    ruary 1, is awarded options on June 30, exercises the
    options on March 1 of the following year, and continues
    employment thereafter, the income would not be
    includable in Connecticut adjusted gross income
    because the taxpayer was not performing services in
    Connecticut during January, the first month of the tax-
    able year in which the options were granted. Other
    similar examples could be envisaged. In addition, this
    construction is without a limiting principle. A taxpayer
    who takes one month of leave could claim that he was
    not performing services ‘‘throughout the continuance
    or course of’’ the relevant period. Perhaps a similar
    claim could be made for a week of leave, or even a
    day. This construction of the regulation is unreasonable
    and does not give effect to the intention of the defendant
    in promulgating the regulation.
    Application of the second definition of ‘‘during,’’ i.e.,
    ‘‘at some point in the course of,’’ furnishes a reasonable
    construction of the regulatory language at issue. Under
    this construction, if at any point during the taxable year
    in which the options were granted and the taxable year
    in which the options were exercised the taxpayer were
    performing services in Connecticut, the income derived
    from the exercise of the options would be includable in
    Connecticut adjusted gross income. In turn, subsections
    (b) and (c) of § 12-711(b)-18 of the regulations set forth
    the extent to which the income is includable in Connect-
    icut adjusted gross income on the basis of whether
    the services were performed wholly or partially within
    Connecticut. This construction imposes no irrational or
    arbitrary conditions upon the taxation of option income
    and comports comfortably with the due process princi-
    ple that a state may tax the compensation of nonresi-
    dents who perform services within the taxing state. See
    part II C of this opinion.
    The plaintiffs’ claim that the defendant’s construction
    of the regulation would result in absurd results because
    a nonresident would be taxed upon the exercise of
    stock options but ‘‘income distributed from a pension
    or retirement plan to nonresidents’’ would not be sub-
    ject to taxation. Regs., Conn. State Agencies § 12-
    711(b)-12. This is absurd, the plaintiffs claim, because
    while both forms of income are earned while per-
    forming services in the state, only the former is subject
    to taxation. We disagree that this is an absurd result.
    First, we note that federal law prohibits state taxation
    of a nonresident’s retirement income. See 4 U.S.C. § 114
    (a).19 Second, it is well established that ‘‘[a] [s]tate may
    divide different kinds of property into classes and assign
    to each class a different tax burden so long as those
    divisions and burdens are reasonable.’’ Allegheny Pitts-
    burgh Coal Co. v. County Commission, 
    488 U.S. 336
    ,
    344, 
    109 S. Ct. 633
    , 
    102 L. Ed. 2d 688
    (1989); cf. Allied
    Stores of Ohio, Inc. v. Bowers, 
    358 U.S. 522
    , 526–27, 
    79 S. Ct. 437
    , 
    3 L. Ed. 2d 480
    (1959) (‘‘The [s]tate may
    impose different specific taxes upon different trades
    and professions and may vary the rate of excise upon
    various products. It is not required to resort to close
    distinctions or to maintain a precise, scientific unifor-
    mity with reference to composition, use or value.’’). This
    disparate treatment of two different forms of income
    reflects the policy judgment that the defendant may
    exercise pursuant to the authority vested in it by the leg-
    islature.
    Allen was performing services solely within Connecti-
    cut when he earned the Premcor options in 2005.
    Accordingly, we conclude that the income derived from
    the exercise of the Premcor options by Allen in 2006
    and 2007 is properly taxable under § 12-711(b)-18 (a)
    of the regulations.
    C
    We next address whether the trial court properly
    concluded that the taxation of the income derived from
    Allen’s exercise of the Premcor options in 2006 and
    2007 while a nonresident of Connecticut violated the
    due process clause of the federal constitution. The
    plaintiffs claim that taxation of income derived from
    the exercise of stock options by a nonresident violates
    the due process clause because the options had no
    readily ascertainable value when they were granted and
    there was an insufficient nexus between Connecticut
    and the value attributable to the options at the time of
    exercise. The defendant claims that the fact that Allen
    was granted the stock options as compensation for
    performing services in Connecticut serves as a suffi-
    cient nexus to the state to satisfy the requirements of
    the due process clause. We agree with the defendant.
    In this appeal challenging the constitutionality of a
    regulation, we apply the same standard of review for
    challenges to the constitutionality of a statute.
    ‘‘Determining the constitutionality of a statute presents
    a question of law over which our review is plenary.
    . . . It [also] is well established that a validly enacted
    statute carries with it a strong presumption of constitu-
    tionality, [and that] those who challenge its constitu-
    tionality must sustain the heavy burden of proving its
    unconstitutionality beyond a reasonable doubt. . . .
    The court will indulge in every presumption in favor of
    the statute’s constitutionality . . . . Therefore, [w]hen
    a question of constitutionality is raised, courts must
    approach it with caution, examine it with care, and
    sustain the legislation unless its invalidity is clear.’’
    (Internal quotation marks omitted.) Doe v. Hartford
    Roman Catholic Diocesan Corp., 
    317 Conn. 357
    , 405,
    
    119 A.3d 462
    (2015).
    The power of Connecticut to impose a tax is a firmly
    rooted inherent sovereign power. See Shaffer v. Carter,
    
    252 U.S. 37
    , 51, 
    40 S. Ct. 221
    , 
    64 L. Ed. 445
    (1920) (‘‘[t]he
    rights of the several [s]tates to exercise the widest lib-
    erty with respect to the imposition of internal taxes
    always has been recognized in the decisions of [the
    Supreme Court of the United States]’’); M’Culloch v.
    Maryland, 17 U.S. (4 Wheat.) 316, 429, 
    4 L. Ed. 579
    (1819) (‘‘It is obvious, that it is an incident of sover-
    eignty, and is co-extensive with that to which it is an
    incident. All subjects over which the sovereign power
    of a [s]tate extends, are objects of taxation . . . .’’).
    This sovereign power, however, is not unbounded. The
    due process clause of the fourteenth amendment to the
    United States constitution20 places a limit upon Con-
    necticut’s power to impose a tax.21 ‘‘A state is free to
    pursue its own fiscal policies, unembarrassed by the
    [c]onstitution, if by the practical operation of a tax the
    state has exerted its power in relation to opportunities
    which it has given, to protection which it has afforded,
    to benefits which it has conferred by the fact of being
    an orderly, civilized society.’’ (Internal quotation marks
    omitted.) Chase Manhattan Bank v. Gavin, 
    249 Conn. 172
    , 184, 
    733 A.2d 782
    , cert. denied, 
    528 U.S. 965
    , 
    120 S. Ct. 401
    , 
    145 L. Ed. 2d 312
    (1999), quoting Wisconsin
    v. J. C. Penney Co., 
    311 U.S. 435
    , 444, 
    61 S. Ct. 246
    , 
    85 L. Ed. 267
    (1940).
    ‘‘[T]he due process clause denies to the state power
    to tax or regulate the [entity’s] property and activities
    elsewhere.’’ Connecticut General Life Ins. Co. v. John-
    son, 
    303 U.S. 77
    , 80–81, 
    58 S. Ct. 436
    , 
    82 L. Ed. 673
    (1938).
    In order to determine whether a state tax comports with
    the constraints of the due process clause, a reviewing
    court shall examine ‘‘whether the taxing power exerted
    by the state bears a fiscal relation to protection, oppor-
    tunities and benefits given by the state. The simple
    but controlling question is whether the state has given
    anything for which it can ask return.’’ (Internal quota-
    tion marks omitted.) Chase Manhattan Bank v. 
    Gavin, supra
    , 
    249 Conn. 184
    .
    The standard has been refined to a two part test.
    ‘‘The [d]ue [p]rocess [c]lause demands that [1] there
    exist some definite link, some minimum connection,
    between a state and the person, property or transaction
    it seeks to tax, as well as [2] a rational relationship
    between the tax and the values connected with the
    taxing [s]tate.’’ (Internal quotation marks omitted.)
    MeadWestvaco Corp. v. Illinois Dept. of Revenue, 
    553 U.S. 16
    , 24, 
    128 S. Ct. 1498
    , 
    170 L. Ed. 2d 404
    (2008);
    see also Quill Corp. v. North Dakota, 
    504 U.S. 298
    , 306,
    
    112 S. Ct. 1904
    , 
    119 L. Ed. 2d 91
    (1992); Mobil Oil Corp.
    v. Commissioner of Taxes, 
    445 U.S. 425
    , 436–37, 
    100 S. Ct. 1223
    , 
    63 L. Ed. 2d 510
    (1980); Moorman Mfg. Co.
    v. Bair, 
    437 U.S. 267
    , 272–73, 
    98 S. Ct. 2340
    , 
    57 L. Ed. 2d
    197 (1978).
    The first prong of the test, the minimum connection
    requirement, may be satisfied in a number of circum-
    stances. ‘‘It is well established that a state may tax all
    of the income of one of its domiciliaries, irrespective of
    the source of that income, geographical or otherwise.’’
    Chase Manhattan Bank v. 
    Gavin, supra
    , 
    249 Conn. 188
    , citing Oklahoma Tax Commission v. Chickasaw
    Nation, 
    515 U.S. 450
    , 462–63, 
    115 S. Ct. 2214
    , 
    132 L. Ed. 2d
    400 (1995). It is equally well established that a state
    may tax the income of nonresidents earned within the
    taxing state. See Shaffer v. 
    Carter, supra
    , 
    252 U.S. 52
    (‘‘just as a [s]tate may impose general income taxes
    upon its own citizens and residents whose persons are
    subject to its control, it may, as a necessary conse-
    quence, levy a duty of like character, and not more
    onerous in its effect, upon incomes accruing to [nonresi-
    dents] from their property or business within the [s]tate,
    or their occupations carried on therein; enforcing pay-
    ment, so far as it can, by the exercise of a just control
    over persons and property within its borders’’); see also
    Zelinsky v. Tax Appeals Tribunal, 
    1 N.Y.3d 85
    , 97, 
    801 N.E.2d 840
    , 
    769 N.Y.S.2d 464
    (2003) (concluding that
    Connecticut resident ‘‘clearly has a ‘minimum connec-
    tion’ to New York by virtue of his employment’’ at New
    York law school). Additionally, as we have previously
    noted, the United States Supreme Court has incorpo-
    rated principles from its judicial jurisdiction line of
    cases into the ‘‘minimum connection’’ analysis by
    rejecting the formalistic test of taxpayer ‘‘ ‘presence’ ’’
    in the jurisdiction and analyzing whether the taxpayer’s
    contacts with the state make the exercise of jurisdiction
    reasonable. See Chase Manhattan Bank v. 
    Gavin, supra
    , 186–87 (discussing Quill v. North 
    Dakota, supra
    ,
    
    504 U.S. 306
    –308).22
    With respect to the second prong of the test, a rational
    relationship between the tax and the values connected
    with the taxing state, ‘‘its principal application has been
    in cases in which a state seeks to attribute to its tax base
    some portion of the property or income of a multistate
    business enterprise that does business in the state. In
    such cases, the ‘values’ to which the test refers are
    numerical, economic or fiscal values—property values
    in a broad sense; not values in a social science sense—
    and the cases require, in general terms, that only a
    fair proportion of the property or income of the total
    enterprise be attributed to the taxing state. See, e.g.,
    Mobil Oil Corp. v. Commissioner of Taxes of 
    Vermont, supra
    , 
    445 U.S. 425
    ; Moorman Mfg. Co. v. 
    Bair, supra
    ,
    
    437 U.S. 267
    ; Norfolk & Western [Railway] Co. v. Mis-
    souri Tax Commission, [
    390 U.S. 317
    , 
    88 S. Ct. 995
    , 19 L.
    Ed. 2d 1201 (1968)].’’ Chase Manhattan Bank v. 
    Gavin, supra
    , 
    249 Conn. 185
    n.14.
    We conclude that taxation of the income derived from
    Allen’s exercise of the Premcor options comports with
    the due process clause of the federal constitution. The
    jurisdictional fact that Allen earned the stock options
    while performing services in Connecticut serves, for
    purposes of the due process clause, as a sufficient ‘‘min-
    imum connection, between a state and the person, prop-
    erty or transaction it seeks to tax . . . .’’ (Internal
    quotation marks omitted.) MeadWestvaco Corp. v. Illi-
    nois Dept. of 
    Revenue, supra
    , 
    553 U.S. 24
    . It has been
    well settled for nearly one century that, without
    offending the due process clause, the state may tax
    ‘‘incomes accruing to nonresidents from . . . occupa-
    tions carried on therein . . . .’’ Shaffer v. 
    Carter, supra
    ,
    
    252 U.S. 52
    . When Allen earned the stock options as
    compensation, he was performing services in the state
    of Connecticut.23 During the course of his service within
    the state, he enjoyed the benefits and protections atten-
    dant to employment within this state. See 
    id., 50 (‘‘[t]hat
    the [s]tate, from whose laws property and business
    and industry derive the protection and security without
    which production and gainful occupation would be
    impossible, is debarred from exacting a share of those
    gains in the form of income taxes for the support of
    the government, is a proposition so wholly inconsistent
    with fundamental principles as to be refuted by its
    mere statement’’).
    It is without question that, in both substance and
    form, stock options are compensation for services per-
    formed for the employer. As one scholar who has exam-
    ined the use of stock option grants as compensation
    described them, ‘‘[o]ptions are the best compensation
    mechanism we have for getting managers to act in ways
    that ensure the long-term success of their companies
    and the well-being of their workers and stockholders.’’
    B. Hall, ‘‘What You Need to Know About Stock Options,’’
    78 Harv. Bus. Rev. (March-April 2000), pp. 121–22.
    Indeed, by the late 1990s, ‘‘the grant-date value of stock
    options accounted for 40 percent of total pay for [chief
    executive officers of companies listed on the Standard
    and Poor’s 500 index] . . . .’’ B. Hall & K. Murphy,
    ‘‘Optimal Exercise Prices for Executive Stock Options,’’
    90 Am. Econ. Rev. 209 (2000).24 Both federal and state
    tax law acknowledge this practical reality regarding the
    compensatory nature of stock options and the income
    derived therefrom. The United States Supreme Court
    noted in LoBue, ‘‘it seems impossible to say that [the
    bargain transfer at the exercise of the stock option]
    was not compensation.’’ Commissioner of Internal
    Revenue v. 
    LoBue, supra
    , 
    351 U.S. 247
    ; see also Com-
    missioner of Internal Revenue v. Smith, 
    324 U.S. 177
    ,
    181–82, 
    65 S. Ct. 591
    , 
    89 L. Ed. 830
    (1945) (‘‘[h]ence
    the compensation for respondent’s services, which the
    parties contemplated, plainly was not confined to the
    mere delivery to respondent of an option of no present
    value, but included the compensation obtainable by the
    exercise of the option given for that purpose’’); Rice v.
    Montgomery, 
    104 Ohio App. 3d 776
    , 782–83, 
    663 N.E.2d 389
    (1995) (‘‘[the] plaintiff’s exercise of the stock option
    did not yield income from stock as [the] plaintiff main-
    tains, but rather yielded him earned compensation
    which took the form of stock attained at lower than
    market price’’ [internal quotation marks omitted]); 26
    C.F.R. § 1.83-7 (a) (‘‘[i]f the option is exercised . . .
    the employee or independent contractor realizes com-
    pensation upon such transfer’’ [emphasis added]).
    Because Allen was awarded the stock options as com-
    pensation for performing services in Connecticut, there
    is a sufficient jurisdictional nexus for Connecticut to
    impose a tax on the compensation.
    The plaintiffs claim, however, that the fact that Allen
    exercised the stock options after he had ceased per-
    forming services in Connecticut and began residing out-
    side of Connecticut severs the jurisdictional nexus. The
    plaintiffs, in support of their argument, rely on Chase
    Manhattan Bank v. 
    Gavin, supra
    , 
    249 Conn. 202
    –203,
    in which this court reasoned as follows: ‘‘We think that
    it is implicit in the due process test that the benefits
    afforded by the state to a domiciliary, or its functional
    equivalent, justifying the taxation of its income, must
    generally span the time period during which the income
    was earned, and not solely antedate that time period
    without any continuing effect.’’25 (Internal quotation
    marks omitted.) This principle does not stretch so far
    as to require that the benefits afforded by the state
    ‘‘must generally span . . . and not solely antedate’’
    realization of the income as the plaintiffs suggest;
    rather, it demands that enjoyment of the benefits pro-
    vided by the state be contemporaneous with earning
    the income. Thus, the intervening passage of time
    between Allen’s cessation of employment in the state
    and the exercise of the stock options he earned per-
    forming services in the state does not deprive the state
    of jurisdiction to tax the income derived from the exer-
    cise of the stock options.
    The plaintiffs further contend that the income real-
    ized from the exercise of the stock options is not a
    result of the performance of services in Connecticut;
    but rather that the income is a result of the appreciation
    in value of the underlying stock, which is not connected
    to Allen’s performance of services within the state. We
    disagree with this characterization of the income
    derived from the exercise of stock options.26 The plain-
    tiffs rightly point out that the stock options had no
    reasonably ascertainable fair market value at the time
    the options were awarded and, consequently, were not
    subject to taxation at the time they were granted. See
    26 U.S.C. § 83 (e) (3). Stock options do, however, have
    value at the time of award. Nonqualified stock options
    would not be contemplated as a form of compensation
    if they did not constitute value to the parties of an
    employment contract. The difficulty lies in quantifying
    the value of the stock options.27 By implementing the
    applicable regulations, both the United States Internal
    Revenue Service and the defendant determined that,
    rather than taxing the speculative value of the options
    at the time of award, the better course of action is to
    calculate the taxable income on the basis of the ‘‘bargain
    element’’ at the time of exercise. See Rice v. Montgom-
    
    ery, supra
    , 
    104 Ohio App. 3d 781
    (‘‘[Federal law]
    resolves the difficulty of valuing a nontransferable stock
    option by waiting until the option is exercised, at which
    time there is a recognition of income equal to the differ-
    ence between the option price and the fair market value
    of the stock at the time of the exercise. At the moment
    that the income is recognized, a fair market value can
    be assigned to the stock option.’’). For compensation
    in the form of stock options, the intended compensation
    for services performed within the state is measured and
    taxed at the time the options are exercised. See Rank
    v. United 
    States, supra
    , 
    345 F.2d 343
    (‘‘[a]nd whatever
    the conceptual shortcomings might be to a theory which
    attributes to a right then having no ascertainable value
    the value of its fruits when and as they acquire demon-
    strable worth, it makes tax sense if not common
    sense’’). Due process does not demand that compensa-
    tion be taxed by the application of a formula that utilizes
    economic values that are ascertainable only contempo-
    raneously with the performance of services in the taxing
    state. Rather, it is sufficient to satisfy due process
    requirements that, for a state to impose a tax on the
    compensation of a nonresident, the taxpayer has per-
    formed the services in the taxing state. Shaffer v. 
    Carter, supra
    , 
    252 U.S. 52
    .28
    Finally, we briefly address the second prong of the
    due process test, which requires ‘‘a rational relationship
    between the tax and the values connected with the
    taxing [s]tate.’’ (Internal quotation marks omitted.)
    MeadWestvaco Corp. v. Illinois Dept. of 
    Revenue, supra
    ,
    
    553 U.S. 24
    . As the plaintiffs concede, this prong’s ‘‘prin-
    cipal application has been in cases in which a state
    seeks to attribute to its tax base some portion of the
    property or income of a multistate business enterprise
    that does business in the state. . . . [T]he cases
    require, in general terms, that only a fair proportion
    of the property or income of the total enterprise be
    attributed to the taxing state.’’ Chase Manhattan Bank
    v. 
    Gavin, supra
    , 
    249 Conn. 185
    n.14. Because it is undis-
    puted that Allen was awarded the stock options for
    performing services only in Connecticut and this issue
    does not implicate a multistate business enterprise, we
    perceive this prong to be inapplicable to the constitu-
    tional analysis.
    Accordingly we conclude that § 12-711(b)-18 of the
    regulations applies to the plaintiffs in this case and, as
    applied, does not violate the due process clause of the
    fourteenth amendment.
    The form of the judgment with respect to the 2002
    taxable year is improper, the judgment is reversed with
    respect to that taxable year and the case is remanded
    with direction to dismiss the plaintiffs’ corresponding
    appeal for lack of subject matter jurisdiction; the judg-
    ment is affirmed in all other respects.
    In this opinion the other justices concurred.
    * December 28, 2016, the date that this decision was released as a slip
    opinion, is the operative date for all substantive and procedural purposes.
    1
    The plaintiffs appealed to the Appellate Court, and we transferred the
    appeal to this court pursuant to General Statutes § 51-199 (c) and Practice
    Book § 65-1.
    2
    ‘‘Stock options [also known as call options] allow an employee to buy
    the employer’s stock at a specified future date at a price [know as the strike
    price or exercise price] fixed on the date that the stock is granted. Stock
    options are granted with the expectation that the stock will increase in
    price during the intervening period, thus allowing the grantee the right to
    buy the stock significantly below its market price.’’ (Internal quotation marks
    omitted.) Scully v. US WATS, Inc., 
    238 F.3d 497
    , 507 (3d Cir. 2001). ‘‘Statutory
    stock options are compensatory options that meet certain criteria and are
    treated differently under the Internal Revenue Code.’’ United States v. Tuff,
    
    469 F.3d 1249
    , 1251 n.2 (9th Cir. 2006). Options that do not meet these
    requirements are called ‘‘nonqualifed’’ or ‘‘nonstatutory’’ stock options. 
    Id. 3 While
    both Jefferson Allen and Evita Allen are the plaintiffs in this appeal,
    only income earned by Jefferson Allen is relevant to this appeal. For the
    sake of simplicity, hereinafter we refer to Jefferson Allen, individually, by
    his surname.
    4
    It is undisputed that all of the options pertinent to this appeal did not
    have a readily ascertainable fair market value at the time they were awarded
    to Allen.
    5
    In August, 2005, Premcor was acquired by Valero, Inc. (Valero). As a
    consequence of the acquisition, Allen’s stock options were converted to
    options for Valero stock. For the sake of consistency, we refer to the options
    Allen earned in 2005 as Premcor options.
    6
    General Statutes § 12-730 provides relevant part: ‘‘[A]ny taxpayer
    aggrieved because of any determination or disallowance by the commis-
    sioner under section 12-729, 12-729a or 12-732 may, within one month after
    notice of the commissioner’s determination or disallowance is mailed to
    the taxpayer, take an appeal therefrom to the superior court for the judicial
    district of New Britain . . . .’’
    7
    The parties agree that the due date for filing an income tax return for
    the taxable year 2002 was April 15, 2003. See General Statutes § 12-719 (a)
    (‘‘[t]he income tax return required under this chapter shall be filed on or
    before the fifteenth day of the fourth month following the close of the
    taxpayer’s taxable year’’). Consequently, the last day that the plaintiffs could
    have filed a claim for a refund was April 15, 2006. The plaintiffs filed their
    claim for a refund for income tax paid for taxable year 2002 on or about
    October 13, 2009.
    8
    General Statutes § 12-732 (a) (1) provides in relevant part: ‘‘If any tax
    has been overpaid, the taxpayer may file a claim for refund in writing with
    the commissioner within three years from the due date for which such
    overpayment was made, stating the specific grounds upon which the claim
    is founded, provided if the commissioner has extended the time for the
    filing of an income tax return by the taxpayer, the taxpayer may file a claim
    for refund within three years after the date on which the income tax return
    is filed by the taxpayer or within three years after the extended due date
    of the income tax return, whichever is earlier. . . . Failure to file a claim
    within the time prescribed in this section constitutes a waiver of any demand
    against the state on account of overpayment. . . .’’
    9
    With respect to the plaintiffs’ claim that the prescribed three year limita-
    tion period set forth in § 12-732 is not jurisdictional, we find their reliance
    upon Williams v. Commission on Human Rights & 
    Opportunities, supra
    ,
    
    257 Conn. 258
    , to be misplaced. The statute at issue in Williams did not
    implicate sovereign immunity. Thus, that case furnishes no persuasive basis
    to deviate from our firmly rooted principles of sovereign immunity. The
    plaintiffs’ citation to Wiele v. Board of Assessment Appeals, 
    119 Conn. App. 544
    , 
    988 A.2d 889
    (2010) is inapposite for much the same reason. That
    case concerned a municipal tax appeal, and, accordingly, did not implicate
    sovereign immunity. See Vejseli v. Pasha, 
    282 Conn. 561
    , 572, 
    923 A.2d 688
    (2007) (‘‘[W]e expressly have recognized that, [u]nlike the state, municipali-
    ties have no sovereign immunity from suit. . . . Rather, municipal govern-
    ments have a limited immunity from liability.’’ [Internal quotation marks
    omitted.]).
    10
    The plaintiff in DaimlerChrysler Corp. also did not qualify as a ‘‘ ‘tax-
    payer’ ’’ as that term was contemplated by the Connecticut Sales and Use
    Taxes Act, General Statutes § 12-406 et seq. DaimlerChrysler Corp. v. 
    Law, supra
    , 
    284 Conn. 716
    .
    11
    The plaintiff in Crystal, the Federal Deposit Insurance Corporation, was
    appointed as receiver to two insolvent banks. Federal Deposit Ins. Corp.
    v. 
    Crystal, supra
    , 
    251 Conn. 750
    –51 n.2. As a result, the plaintiff succeeded
    to the assets and liabilities of the insolvent banks, including the banks’
    claims against the Commissioner of Revenue Services in that case. 
    Id. 12 General
    Statutes § 12-225 (b) (1) provides in relevant part: ‘‘Any company
    which fails to include in its return items of deductions or includes items of
    nontaxable income or makes any other error in such return may, within
    three years from the due date of the return, file with the commissioner an
    amended return, together with a claim for refund of taxes overpaid as shown
    by such amended return. Failure to file a claim within the time prescribed
    in this section constitutes a waiver of any demand against the state on
    account of overpayment. . . .’’
    13
    Consistent with our principles with respect to sovereign immunity and
    subject matter jurisdiction, the three year period may not be equitably tolled.
    See Williams v. Commission on Human Rights & 
    Opportunities, supra
    ,
    
    257 Conn. 277
    (noting that ‘‘the notion of equitable tolling . . . is inconsis-
    tent with the concept of subject matter jurisdiction’’).
    14
    ‘‘‘Adjusted gross income’ means the adjusted gross income of a natural
    person with respect to any taxable year, as determined for federal income
    tax purposes and as properly reported on such person’s federal income tax
    return.’’ General Statutes § 12-701 (a) (19). ‘‘ ‘Connecticut adjusted gross
    income’ ’’ means adjusted gross income subject to modifications not relevant
    to this appeal. General Statutes § 12-701 (a) (20).
    15
    ‘‘We long have held that when our tax statutes refer to the federal tax
    code, federal tax concepts are incorporated into state law. . . . Although
    this rule does not require the wholesale incorporation of the entire body
    of federal tax principles into our state income tax scheme, where a reference
    to the federal tax code expressly is made in the language of a statute, and
    where incorporation of federal tax principles makes sense in light of the
    statutory language at issue, our prior cases uniformly have held that incorpo-
    ration should take place.’’ (Citations omitted; internal quotation marks omit-
    ted.) Berkley v. Gavin, 
    253 Conn. 761
    , 773, 
    756 A.2d 248
    (2000).
    16
    Title 26 of the Code of Federal Regulations, § 1.83-7 (a), provides in
    relevant part: ‘‘If there is granted to an employee or independent contractor
    (or beneficiary thereof) in connection with the performance of services, an
    option to which section 421 (relating generally to certain qualified and other
    options) does not apply, section 83(a) shall apply to such grant if the option
    has a readily ascertainable fair market value (determined in accordance
    with paragraph [b] of this section) at the time the option is granted. The
    person who performed such services realizes compensation upon such grant
    at the time and in the amount determined under section 83(a). If section
    83(a) does not apply to the grant of such an option because the option does
    not have a readily ascertainable fair market value at the time of grant,
    sections 83(a) and 83(b) shall apply at the time the option is exercised or
    otherwise disposed of, even though the fair market value of such option
    may have become readily ascertainable before such time. If the option is
    exercised, sections 83(a) and 83(b) apply to the transfer of property pursuant
    to such exercise, and the employee or independent contractor realizes com-
    pensation upon such transfer at the time and in the amount determined
    under section 83(a) or 83(b). . . .’’
    17
    Because we conclude that § 12-711(b)-18 (a) of the regulations is unam-
    biguous, the plaintiffs are not entitled to a construction in their favor. See
    Sikorsky Aircraft Corp. v. Commissioner of Revenue Services, 
    297 Conn. 540
    , 561, 
    1 A.3d 1033
    (2010).
    18
    We disagree with the plaintiffs’ contention that the contrast between
    subsections (a) and (c), i.e., the fact that the latter contains a formula
    while the former does not, highlights the ambiguity in § 12-711(b)-18 of the
    regulations. Subsection (c) delineates the quantum of income that, pursuant
    to subsection (a), is defined as includable in Connecticut adjusted gross
    income; it is not itself a definition of income includable in Connecticut
    adjusted gross income separate and apart from subsection (a).
    19
    Title 4 of the United States Code, § 114 (a), provides: ‘‘No State may
    impose an income tax on any retirement income of an individual who is
    not a resident or domiciliary of such State (as determined under the laws
    of such State).’’
    20
    ‘‘No State shall make or enforce any law which shall abridge the privi-
    leges or immunities of citizens of the United States; nor shall any State
    deprive any person of life, liberty, or property, without due process of law;
    nor deny to any person within its jurisdiction the equal protection of the
    laws.’’ U.S. Const., amend. XIV, § 1.
    21
    In addition to the due process clause, the commerce clause of the federal
    constitution places an additional limit upon the state’s power to impose a
    tax. MeadWestvaco Corp. v. Illinois Dept. of Revenue, 
    553 U.S. 16
    , 24, 
    128 S. Ct. 1498
    , 
    170 L. Ed. 2d 404
    (2008) (‘‘[t]he [c]ommerce [c]lause forbids the
    [s]tates to levy taxes that discriminate against interstate commerce or that
    burden it by subjecting activities to multiple or unfairly apportioned
    taxation’’).
    22
    In Quill, the United States Supreme Court concluded that the due pro-
    cess requirements were satisfied by the fact that the taxpayer ‘‘engaged in
    continuous and widespread solicitation of business within [the] [s]tate’’ such
    that the taxpayer ‘‘clearly ha[d] fair warning that [its] activity may subject
    [it] to the jurisdiction of a foreign sovereign.’’ (Internal quotation marks
    omitted.) Quill v. North 
    Dakota, supra
    , 
    504 U.S. 308
    .
    23
    We note also that the plaintiffs also enjoyed the benefits and protections
    afforded domiciliaries while Allen was performing the services for which
    he was granted the stock options.
    24
    While it is true that use of stock option awards as a form of executive
    compensation has declined recently; S. Hannes & A. Tabbach, ‘‘Executive
    Stock Options: The Effects of Manipulation on Risk Taking,’’ 38 J. Corp. L.
    533, 539–40 (2013); this in no way alters the fact that such awards are
    compensation for services performed.
    25
    The plaintiffs also rely on a recent Ohio Supreme Court case which
    stated that, ‘‘[u]nder [Shaffer v. 
    Carter, supra
    , 
    252 U.S. 37
    ], the income of
    a nonresident is the ‘res,’ or thing, that lies within the taxing jurisdiction
    by virtue of the activity being performed within that jurisdiction. Thus, local
    taxation of a nonresident’s compensation for services must be based on the
    location of the taxpayer when the services were performed.’’ Hillenmeyer
    v. Cleveland Board of Review, 
    144 Ohio St. 3d 165
    , 176, 
    41 N.E.3d 1164
    ,
    cert. denied,       U.S.     , 
    136 S. Ct. 491
    , 
    193 L. Ed. 2d 352
    (2015).
    26
    The plaintiffs’ reliance upon the ‘‘secondary holding’’ in Molter v. Dept.
    of Treasury, 
    443 Mich. 537
    , 551–52, 
    505 N.W.2d 244
    (1993), is also misplaced.
    In that case, the Michigan Supreme Court held that interest earned, and
    subsequently disbursed to a nonresident, as part of a deferred compensation
    plan was not attributable to services performed in the taxing state. 
    Id. That case,
    however, turned on the interpretation of a state statute that subjected
    interest income to taxation, not on the due process clause. See 
    id., 552 n.13
    (distinguishing Michigan statute from related New Jersey statute).
    27
    There is a methodology for ascertaining the present value of stock
    options. ‘‘The Black-Scholes option-pricing model is a standard model used
    by analysts for pricing options. Fisher Black and Myron Scholes, the develop-
    ers of the model, won Nobel Prizes in economics following the development
    of the model. The existence of variables (the risk free rate, volatility of the
    underlying stock, expiration date of the option, etc.) may cause the model
    to have less reliability, however, in certain circumstances.’’ In re Coleman
    Co. Inc. Shareholders, 
    750 A.2d 1202
    , 1208 n.13 (Del. Ch. 1999).
    28
    We are unmoved by the plaintiffs’ warning that ‘‘horribles would parade’’
    as a result of our conclusion. Contrary to the plaintiffs’ claim, a state of
    prior residence would not be able to impose a tax on a nonresident taxpayer
    living and working in another state simply because the taxpayer enjoyed
    benefits and protection during his time of residence in that state. Jurisdiction
    is not predicated on whether a taxpayer has ever enjoyed the benefits or
    protections of a state ‘‘that made the executive’s income possible’’; instead,
    ‘‘the benefits afforded by the state . . . must generally span the time period
    during which the income was earned . . . .’’ (Emphasis added.) Chase Man-
    hattan Bank v. 
    Gavin, supra
    , 
    249 Conn. 202
    –203.