Avinesh Kumar v. Republic of Sudan , 880 F.3d 144 ( 2018 )


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  •                                       PUBLISHED
    UNITED STATES COURT OF APPEALS
    FOR THE FOURTH CIRCUIT
    No. 16-2267
    AVINESH KUMAR, Individually and as the Guardian of the Estate and Next
    Friend of C.K., a minor; JENNIFER CLODFELTER, Individually and as Next
    Friend of N.C., a minor; JOHN CLODFELTER; GLORIA CLODFELTER;
    JOSEPH CLODFELTER; SHARLA COSTELOW, Individually and as the Next
    Friend of E.C. and B.C., minors; GEORGE COSTELOW; DOROTHY
    COSTELOW; RONALD W. FRANCIS; SANDRA FRANCIS; DAVID
    FRANCIS; JAMES FRANCIS; SARAH GUANA ESQUIVEL; LOU GUNN;
    MONA GUNN; ANTON J. GUNN; JAMAL GUNN; JASON GUNN; NOVELLA
    WIGGINS; DIANE MCDANIELS, Individually and as Next Friend of J.M., a
    minor; FREDERICKA MCDANIELS-BESS; JESSE NIETO; JAMIE OWENS,
    Individually and as the Guardian of the Estate and Next Friend of I.M.O., a minor;
    KENYON EMBRY; TERESA SMITH; HUGH M. PALMER; LEROY
    PARLETT; ETTA PARLETT, Individually and as Next Friend of H.P., a minor;
    KERA PARLETT MILLER; MATTHEW PARLETT; KATE BROWN; SEAN
    WALSH; KEVIN ROY; OLIVIA RUX; ROGELIO SANTIAGO; SIMEONA
    SANTIAGO; JACQUELINE SAUNDERS, Individually and as the Guardian of the
    Estate and Next Friend for J.T.S., a minor; ISLEY GAYLE SAUNDERS; GARY
    SWENCHONIS, SR.; DEBORAH SWENCHONIS; SHALALA SWENCHONIS-
    WOOD; LORIE D. TRIPLETT, Individually and as the Guardian of the Estate and
    Next Friend of A.T. and S.R.T., minors; SAVANNAH TRIPLETT; FREDDIE
    TRIPLETT; THEODIS TRIPLETT; KEVIN TRIPLETT; WAYNE TRIPLETT;
    THOMAS WIBBERLY; PATRICIA A. WIBBERLY; TONI WIBBERLY;
    TIMOTHY P. SCEVIOUR, as Personal Representative of the Estates of Kenneth
    Eugene Clodfelter, Richard Costelow, Lakeina Monique Francis, Timothy Lee
    Gauna, Cherone Louis Gunn, James Roderick McDaniels, Marc Ian Nieto, Ronald
    Scott Owens, Lakiba Nicole Palmer; TIMOTHY P. SCEVIOUR, as Personal
    Representative of the Estates of Joshua Langdon Parlett, Patrick Howard Roy,
    Kevin Shawn Rux, Ronchester Mananga Santiago, Timothy Lamont Saunders,
    Gary Graham Swenchonis, Jr., Andrew Triplett and Craig Bryan Wibberly,
    Plaintiffs - Appellees,
    and
    REED TRIPLETT,
    Plaintiff,
    and
    OLLESHA SMITH JEAN; JACK EARL SWENSON,
    Consolidated Plaintiffs,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    -----------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2269
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Kenneth
    Eugene Clodfelter; Jennifer Clodfelter, individually and as next friend of N.C., a
    minor; John Clodfelter; Gloria Clodfelter; Joseph Clodfelter,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2271
    2
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Richard
    Costelow; Sharla Costelow, individually and as next friend of E. C. and B.C.,
    minors; George Costelow; Dorothy Costelow,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2272
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Lakeina
    Monique Francis; Ronald W. Francis; Sandra Francis; David Francis; James
    Francis,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant,
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    3
    No. 16-2273
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Timothy Lee
    Guana; Sarah Guana Esquivel,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2275
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Cherone
    Louis Gunn; Lou Gunn; Mona Gunn; Anton J. Gunn; Jason Gunn,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    4
    No. 16-2276
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of James
    Roderick McDaniels; Novella Wiggins; Diane McDaniels, individually and as next
    friend of J.M. a minor; Fredericka McDaniels-Bess,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2280
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Marc Ian
    Nieto; Jesse Nieto,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    5
    No. 16-2281
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Ronald Scott
    Owens; Jamie Owens, individually and as the guardian of the estate and next friend
    of I.M.O., a minor,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2282
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Lakiba
    Nicole Palmer; Avinesh Kumar, individually and as the guardian of the estate and
    next friend of C.K., a minor; Kenyon Embry; Teresa Smith; Hugh M. Palmer; Jack
    Earl Swenson; Ollesha Smith Jean,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    6
    Amicus Supporting Appellant.
    No. 16-2283
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Joshua
    Langdon Parlett; Leroy Parlett; Etta Parlett, individually and as next friend of H.P.,
    a minor; Kera Parlett Miller; Matthew Parlett,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant,
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2284
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Patrick
    Howard Roy; Kate Brown; Sean Walsh; Kevin Roy,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    7
    Amicus Supporting Appellant.
    No. 16-2285
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Kevin Shawn
    Rux; Olivia Rux,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2286
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Ronchester
    Mananga Santiago; Rogelio Santiago; Simeona Santiago,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    8
    Amicus Supporting Appellant.
    No. 16-2287
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Timothy
    Lamont Saunders; Jacqueline Saunders, individually and as the guardian of estate
    and next friend of J.T.S., a minor; Isley Gayle Saunders,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2288
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Gary
    Graham Swenchonis, Jr.; Gary Swenchonis, Sr.; Deborah Swenchonis; Shalala
    Swenchonis-Wood,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    9
    Amicus Supporting Appellant.
    No. 16-2289
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Andrew
    Triplett; Lorie D.Triplett, individually and as the guardian of estate & next friend of
    A.T. & S.R.T., minors; Reed Triplett; Savannah Triplett; Freddie Triplett; Theodis
    Triplett; Kevin Triplett; Wayne Triplett,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2290
    TIMOTHY P. SCEVIOUR, as personal representative of the estate of Craig Bryan
    Wibberly; Thomas Wibberly, Patricia A. Wibberly; Toni Wibberly,
    Plaintiff - Appellee,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellant.
    ------------------------------
    10
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellant.
    No. 16-2365
    AVINESH KUMAR, Individually and as the Guardian of the Estate and Next
    Friend of C.K., a minor; JENNIFER CLODFELTER, Individually and as Next
    Friend of N.C., a minor; JOHN CLODFELTER; GLORIA CLODFELTER;
    JOSEPH CLODFELTER; SHARLA COSTELOW, Individually and as the Next
    Friend of E.C. and B.C., minors; GEORGE COSTELOW; DOROTHY
    COSTELOW; RONALD W. FRANCIS; SANDRA FRANCIS; DAVID
    FRANCIS; JAMES FRANCIS; SARAH GUANA ESQUIVEL; LOU GUNN;
    MONA GUNN; ANTON J. GUNN; JAMAL GUNN; JASON GUNN; NOVELLA
    WIGGINS; DIANE MCDANIELS, Individually and as Next Friend of J.M., a
    minor; FREDERICKA MCDANIELS-BESS; JESSE NIETO; JAMIE OWENS,
    Individually and as the Guardian of the Estate and Next Friend of I.M.O., a minor;
    KENYON EMBRY; TERESA SMITH; HUGH M. PALMER; LEROY
    PARLETT; ETTA PARLETT, Individually and as Next Friend of H.P., a minor;
    KERA PARLETT MILLER; MATTHEW PARLETT; KATE BROWN; SEAN
    WALSH; KEVIN ROY; OLIVIA RUX; ROGELIO SANTIAGO; SIMEONA
    SANTIAGO; JACQUELINE SAUNDERS, Individually and as the Guardian of the
    Estate and Next Friend for J.T.S., a minor; ISLEY GAYLE SAUNDERS; GARY
    SWENCHONIS, SR.; DEBORAH SWENCHONIS; SHALALA SWENCHONIS-
    WOOD; LORIE D. TRIPLETT, Individually and as the Guardian of the Estate and
    Next Friend of A.T. and S.R.T., minors; SAVANNAH TRIPLETT; FREDDIE
    TRIPLETT; THEODIS TRIPLETT; KEVIN TRIPLETT; WAYNE TRIPLETT;
    THOMAS WIBBERLY; PATRICIA A. WIBBERLY; TONI WIBBERLY;
    TIMOTHY P. SCEVIOUR, as Personal Representative of the Estates of Kenneth
    Eugene Clodfelter, Richard Costelow, Lakeina Monique Francis, Timothy Lee
    Gauna, Cherone Louis Gunn, James Roderick McDaniels, Marc Ian Nieto, Ronald
    Scott Owens, Lakiba Nicole Palmer; TIMOTHY P. SCEVIOUR, as Personal
    Representative of the Estates of Joshua Langdon Parlett, Patrick Howard Roy,
    Kevin Shawn Rux, Ronchester Mananga Santiago, Timothy Lamont Saunders,
    Gary Graham Swenchonis, Jr., Andrew Triplett and Craig Bryan Wibberly,
    Plaintiffs - Appellants,
    and
    REED TRIPLETT,
    11
    Plaintiff,
    and
    OLLESHA SMITH JEAN; JACK EARL SWENSON,
    Consolidated Plaintiffs,
    v.
    REPUBLIC OF SUDAN,
    Defendant - Appellee.
    ------------------------------------
    UNITED STATES OF AMERICA,
    Amicus Supporting Appellee.
    Appeal from the United States District Court for the Eastern District of Virginia, at
    Norfolk. Robert G. Doumar, Senior District Judge. (2:10-cv-00171-RGD-TEM)
    Argued: October 24, 2017                                    Decided: January 19, 2018
    Before WILKINSON, DUNCAN, and AGEE, Circuit Judges.
    Reversed in part, vacated in part, and remanded with instructions by published opinion.
    Judge Agee wrote the opinion, in which Judge Wilkinson and Judge Duncan concurred.
    ARGUED: Christopher M. Curran, WHITE & CASE, LLP, Washington, D.C., for
    Appellant/Cross-Appellee. Andrew C. Hall, HALL, LAMB, HALL & LETO, P.A.,
    Miami, Florida, for Appellees/Cross-Appellants. Lewis Yelin, UNITED STATES
    DEPARTMENT OF JUSTICE, Washington, D.C., for Amicus United States of America.
    ON BRIEF: Nicole Erb, Claire A. DeLelle, WHITE & CASE LLP, Washington, D.C.,
    for Appellant/Cross-Appellant. Nelson M. Jones III, Houston, Texas; Kevin E.
    Martingayle, STALLINGS & BISCHOFF, P.C., Virginia Beach, Virginia; Roarke
    Maxwell, HALL, LAMB, HALL & LETO, P.A., Miami, Florida, for Appellees/Cross-
    Appellants. Chad A. Readler, Acting Assistant Attorney General, Sharon Swingle,
    Appellate Staff, Civil Division, UNITED STATES DEPARTMENT OF JUSTICE,
    12
    Washington, D.C.; Richard C. Visek, Acting Legal Adviser, UNITED STATES
    DEPARTMENT OF STATE, Washington, D.C.; Dana J. Boente, United States Attorney,
    OFFICE OF THE UNITED STATES ATTORNEY, Alexandria, Virginia, for Amicus
    United States of America.
    13
    AGEE, Circuit Judge:
    For over a decade, family members of United States sailors killed in the bombing
    of the U.S.S. Cole have pursued litigation in federal court against the Republic of Sudan
    for its alleged support of Al Qaeda, which was responsible for the bombing. This appeal
    arises from the latest suit wherein the district court denied Sudan’s motion to vacate the
    default judgments entered against it. Because the Appellees’ method of serving process
    did not comport with the statutory requirements of 28 U.S.C. § 1608(a)(3), we hold the
    district court lacked personal jurisdiction over Sudan. Accordingly, we reverse the district
    court’s order denying Sudan’s motion to vacate, vacate the judgments, and remand with
    instructions.
    I.
    On October 12, 2000, Al Qaeda bombed the U.S.S. Cole, a United States Navy
    guided-missile destroyer, as it was refueling in the Port of Aden in Yemen. Seventeen
    American sailors were killed and forty-two more were injured.
    A.
    In 2004, family members of the deceased sailors filed a complaint against Sudan
    in the United States District Court for the Eastern District of Virginia (“the Rux
    litigation”). 1 Although foreign states generally enjoy immunity from suit in federal
    1
    This summary of the Rux litigation is drawn from Rux v. Republic of Sudan, 410
    F. App’x 581 (4th Cir. 2011); Rux v. Republic of the Sudan, 
    2009 WL 9057606
    (4th Cir.
    July 4, 2009); and Rux v. Republic of Sudan, 
    461 F.3d 461
    (4th Cir. 2006). The
    (Continued)
    14
    courts, 28 U.S.C. § 1604, the Foreign Sovereign Immunity Act (“FSIA”) authorizes suits
    against a foreign state that has provided material support for certain acts of terrorism
    (“the terrorism exception”). Under the version of the FSIA in effect in 2004, the terrorism
    exception gave federal courts jurisdiction over the foreign state, but any claims had to be
    grounded in another substantive area of the law. See 28 U.S.C. § 1605(a)(7) (repealed
    2008). Accordingly, the Rux plaintiffs’ substantive claims rested on violations of the
    Death on the High Seas Act. With limited exceptions, Sudan did not enter appearances or
    otherwise defend the Rux suit. Following a series of rulings and appeals that are not
    relevant to this appeal, the district court held that Sudan was liable and awarded
    compensatory damages to the plaintiffs. The Rux plaintiffs appealed the district court’s
    denial of their claim for additional damages. During the pendency of that appeal,
    Congress passed the National Defense Authorization Act for Fiscal Year 2008
    (“NDAA”), Pub. L. No. 110–181, § 1083(b)(1)(A)(iii), 122 Stat. 341.
    The NDAA, which became effective on January 28, 2008, repealed the prior FSIA
    terrorism exception to foreign state immunity, reenacted the exception’s immunity-
    stripping language, and created a new substantive cause of action under the FSIA that
    authorizes recovery of noneconomic damages, including solatium and punitive damages.
    See NDAA, Pub. L. No. 110-181, § 1083 (codified at 28 U.S.C. § 1605A). The FSIA’s
    new cause of action also specifically authorizes suit based on certain pre-enactment
    judgments entered in the Rux litigation are final and unaffected by the appeal currently
    before the Court. We summarize what occurred to provide context for the current lawsuit.
    15
    events so long as delineated criteria are satisfied. § 1605A(b). We granted the Rux
    plaintiffs’ motion to remand for further proceedings in the district court in light of the
    revised statutory framework. Rux, 
    2009 WL 9057606
    at *1.
    On remand, the Rux plaintiffs sought leave to supplement their complaint to
    include a claim for noneconomic damages under § 1605A(c). The district court denied
    the motion and the Rux plaintiffs again appealed. While that appeal was pending, the Rux
    plaintiffs and four new plaintiffs filed “a new, related action pursuant to 28 U.S.C.
    § 1605A in the [United States District Court for the] Eastern District of Virginia.” Rux,
    410 F. App’x at 582. In relevant part, we held that the filing of this new complaint
    rendered moot the Rux plaintiffs’ arguments and we dismissed that appeal. Rux, 510 F.
    App’x at 586.
    B.
    The current appeal arises from the district court’s adjudication of that “new,
    related action” brought under the amended FSIA. 2 Kumar filed the current complaint in
    April 2010, alleging that Sudan’s conduct satisfied the immunity-stripping language of §
    1605A(a)(1) and caused the death of the seventeen sailors killed on board the U.S.S.
    2
    The plaintiffs in this case consist of both the original Rux plaintiffs and several
    new plaintiffs. For purposes of this appeal, this factual difference is of no consequence
    and they stand on the same legal footing. We refer to the plaintiffs collectively as
    “Kumar,” one of the named plaintiffs.
    After Kumar first filed the § 1605A-based complaint, the district court sua sponte
    concluded that res judicata barred the Rux plaintiffs’ claims and denied Kumar’s motion
    for entry of default. On appeal, we reversed and remanded the case for further
    proceedings, Clodfelter v. Republic of Sudan, 
    720 F.3d 199
    , 212 (4th Cir. 2013), which
    have led to the appeal now before us.
    16
    Cole, in violation of the FSIA’s new cause of action, § 1605A(c). He sought solatium and
    punitive damages.
    In an effort to effectuate service of process pursuant to 28 U.S.C. § 1608(a)(3), the
    clerk of court sent the requisite documents “via certified mail, return receipt requested,”
    in an enveloped addressed as follows:
    REPUBLIC OF SUDAN
    Serve: Deng Alor Koul,
    Minister of Foreign Affairs
    Embassy of the Republic of Sudan
    2210 Massachusetts Avenue NW
    Washington, DC 20008
    J.A. 158. Someone at the embassy accepted the envelope and signed the certified mail
    receipt.
    Nevertheless, Sudan did not enter an appearance or file any responsive pleadings.
    Consequently, Kumar moved for entry of default and for the court to schedule
    proceedings allowing adjudication of a default judgment. Following a bench trial, the
    district court “found that Sudan’s provision of material support and resources to al Qaeda
    led to the murders of the seventeen American servicemen and women serving on the
    Cole, and entered judgment against Sudan under the FSIA.” J.A. 446. To more efficiently
    resolve the issue of damages, the court divided the suit into seventeen separate cases,
    each case involving all claims related to one of the seventeen deceased sailors.
    In March 2015, after considering additional evidence on the alleged damages, the
    district court entered separate default judgment orders collectively awarding over $20
    17
    million in solatium and approximately $14 million in punitive damages to the Kumar
    plaintiffs.
    In April 2015, just over thirty days after entry of those orders, Sudan entered an
    appearance and moved to vacate the default judgments under Federal Rules of Civil
    Procedure 55(c) and 60(b). In the alternative, Sudan requested the district court extend its
    time to appeal from the default judgments. In support of its motion, Sudan asserted
    numerous arguments challenging the district court’s subject matter and personal
    jurisdiction, as well as the propriety of punitive damages.
    The district court denied the motion to vacate, rejecting each of Sudan’s
    contentions. It did, however, grant Sudan’s motion for an extension of time to file a
    notice of appeal from the March 2015 default judgments. Sudan noted its appeal from
    both the default judgments and the denial of its post-judgment motions. In addition,
    Kumar noted a cross appeal challenging the district court’s order extending Sudan’s time
    to appeal. We have jurisdiction over both appeals pursuant to 28 U.S.C. § 1291.
    II.
    Sudan contends the district court lacked personal jurisdiction over it because
    Kumar did not properly effectuate service of process as required under the FSIA.
    Specifically, it contends that mailing service to the Sudanese embassy in Washington,
    D.C., does not satisfy 28 U.S.C. § 1608(a)(3) and contravenes the 1961 Vienna
    Convention on Diplomatic Relations and Optional Protocol on Disputes (“Vienna
    Convention”), Apr. 18, 1961, 23 U.S.T. 3227, 500 U.N.T.S. 95, which provides that a
    18
    foreign state’s diplomatic mission is inviolable. If the district court lacked personal
    jurisdiction, then the judgment against Sudan is void. Koehler v. Dodwell, 
    152 F.3d 304
    ,
    306–07 (4th Cir. 1998) (“[A]ny judgment entered against a defendant over whom the
    court does not have personal jurisdiction is void.”).
    Because the issue before us is one of statutory interpretation, we review de novo
    the district court’s conclusion that Kumar’s method of serving process satisfied
    § 1608(a)(3). 3 Broughman v. Carver, 
    624 F.3d 670
    , 674 (4th Cir. 2010).
    A.
    The Federal Rule of Civil Procedure governing service of process provides that
    “[a] foreign state . . . must be served in accordance with 28 U.S.C. § 1608,” i.e., the
    FSIA. Fed. R. Civ. P. 4(j)(1). That statute, in turn, describes four methods of serving
    process on a foreign state, listed in hierarchical order. § 1608(a).
    The first method is “in accordance with any special arrangement for service
    between the plaintiff and the foreign state.” § 1608(a)(1). If no such arrangement exists,
    then service may be made “in accordance with an applicable international convention on
    3
    Although Sudan appeals from both the March 2015 default judgments and the
    denial of its Rule 60(b) motion, our standard of review is the same in either posture given
    that the distilled issue before us is one of statutory interpretation: did Kumar’s method of
    serving process comply with § 1608(a)(3)? Because Sudan prevails on this issue
    regardless of which decision is reviewed, we need not consider Kumar’s argument on
    cross appeal that the district court erred in granting Sudan additional time to file its notice
    of appeal from the default judgments. See United States v. Winestock, 
    340 F.3d 200
    , 204
    (4th Cir. 2003) (“District court decisions granting or denying Rule 60(b) relief are
    reviewed for abuse of discretion, although the exercise of discretion cannot be permitted
    to stand if we find it rests upon an error of law.”).
    19
    service of judicial documents.” § 1608(a)(2). And “if service cannot be made under
    [either of these provisions, the specified documents,] together with a translation of each
    into the official language of the foreign state, [can be sent] by any form of mail requiring
    a signed receipt, to be addressed and dispatched by the clerk of the court to the head of
    the ministry of foreign affairs of the foreign state concerned.” § 1608(a)(3). Lastly,
    if service cannot be made within 30 days under [the third method described,
    then two copies of the documents, along with the requisite translation can
    be sent] by any form of mail requiring a signed receipt, to be addressed and
    dispatched by the clerk of the court to the Secretary of State in Washington,
    District of Columbia, to the attention of the Director of Special Consular
    Services—and the Secretary shall transmit one copy of the papers through
    diplomatic channels to the foreign state and shall send to the clerk of the
    court a certified copy of the diplomatic note indicating when the papers
    were transmitted.
    § 1608(a)(4).
    There is no dispute that the first two methods of service described in § 1608(a)
    were not available to Kumar. 4 Further, Kumar did not attempt to serve process by
    delivering the requisite documents through diplomatic channels as set out in subsection
    (a)(4), in part because failure of subsection (a)(3) service is a prerequisite to pursuing
    service under subsection (a)(4) and no question arose as to the validity of Kumar’s
    method of serving process until after judgment.
    The question before the Court, then, is limited to whether Kumar satisfied
    § 1608(a)(3), which allows service by mail “requiring a signed receipt[] to be addressed
    4
    Sudan and the United States do not have any special arrangement for serving
    process, and Sudan is not a signatory to the Convention on Service Abroad of Judicial
    and Extrajudicial Documents, Nov. 15, 1965, 20 U.S.T. 361, T.I.A.S. No. 6638,
    commonly known as the Hague Service Convention.
    20
    and dispatched by the clerk of the court to the head of the ministry of foreign affairs of
    the foreign state.” Specifically, we must decide whether Kumar satisfied the “addressed
    and dispatched to” requirement when he submitted the packet to be mailed by the clerk of
    court to the Sudanese embassy in Washington, D.C. Sudan does not contest compliance
    with the other components of service under subsection (a)(3) and the record shows
    Kumar instructed the clerk of court to send the requisite documents via the United States
    Postal Service’s certified mail system, which is “a[] form of mail requiring a signed
    receipt.” Consequently, our review is limited to whether delivering process to a foreign
    nation’s embassy and identifying the head of that nation’s ministry of foreign affairs as
    the recipient satisfies subsection (a)(3)’s requirement that the mailing is “addressed and
    dispatched to the head of the ministry of foreign affairs of the foreign state.”
    B.
    As always, our duty in a case involving statutory interpretation is “to ascertain and
    implement the intent of Congress.” 
    Broughman, 624 F.3d at 674
    . 5 We begin with the
    statute’s text. Ross v. R.A. North Dev., Inc. (In re Total Realty Mgmt., LLC), 
    706 F.3d 245
    , 254 (4th Cir. 2013). In addition, “[t]he Supreme Court has often emphasized the
    crucial role of context as a tool of statutory construction. For example, the Court has
    stated that when construing a statute, courts must not be guided by a single sentence or
    member of a sentence, but look to the provisions of the whole law, and to its object and
    5
    Here, and throughout, we have omitted internal quotation marks, citations, and
    alterations unless otherwise noted.
    21
    policy.” Brown & Williamson Tobacco Corp. v. FDA, 
    153 F.3d 155
    , 162 (4th Cir. 1998).
    As a result, “the traditional rules of statutory construction to be used in ascertaining
    congressional intent include: the overall statutory scheme, legislative history, the history
    of evolving congressional regulation in the area, and a consideration of other relevant
    statutes.” 
    Id. We begin
    with a general observation: based on § 1608(a)’s four precise methods
    for service of process and how that language contrasts with § 1608(b), subsection (a)
    requires strict compliance. Subsection (b), which applies in suits against “an agency or
    instrumentality of a foreign state,” contains both specific methods of serving process,
    § 1608(b)(1)–(2), and a catchall provision expressly allowing service by any method
    “reasonably calculated to give actual notice,” § 1608(b)(3). Although Congress
    authorized an array of specific and general service options under subsection (b), it did not
    include a similar catchall provision in subsection (a). This contrast between two
    subsections of the same statute suggests that Congress intended that the four methods
    authorized under subsection (a) be the exclusive and explicit means of effectuating
    service of process against foreign states. Russello v. United States, 
    464 U.S. 16
    , 23 (1983)
    (“Where Congress includes particular language in one section of a statute but omits it in
    another section of the same Act, it is generally presumed that Congress acts intentionally
    and purposely in the disparate inclusion or exclusion.”). In other words, had Congress
    intended for a non-delineated method or actual notice to satisfy the requirements for
    serving process on a foreign state, it would have indicated as much by including a similar
    “reasonably calculated” provision in subsection (a). It did not do so.
    22
    Thus, a court cannot excuse noncompliance with the specific requirements of §
    1608(a). See Magness v. Russ. Federation, 
    247 F.3d 609
    , 612–617 (5th Cir. 2001)
    (“Based on [other decisions], the express language of section 1608(a), and the United
    States’ interest in ensuring that the proper officials of a foreign state are notified when a
    suit is instituted, we hold that plaintiffs must strictly comply with the statutory service of
    process provisions when suing a foreign state . . . under section 1608(a).”); Transaero,
    Inc. v. La Fuerza Aerea Boliviana, 
    30 F.3d 148
    , 153–54 (D.C. Cir. 1994) (“We hold that
    strict adherence to the terms of 1608(a) is required.”). 6 In short, “[l]eniency” when
    applying § 1608(a) “would disorder the statutory scheme” Congress enacted. 
    Transaero, 30 F.3d at 154
    .
    We now turn to what, specifically, subsection (a)(3) requires of a plaintiff. First,
    we note the text does not specify a geographic location for the service of process. Instead,
    subsection (a)(3) requires that the mailing of process be “addressed and dispatched” to
    the head of the ministry of foreign affairs. This phrase does not meaningfully limit the
    geographic location where service is to be made, though it does reinforce that the location
    must be related to the intended recipient. See address, Oxford English Dictionary
    (defining the verb “address” as “[t]o send in a particular direction or towards a particular
    6
    The Ninth Circuit has broadly stated that it has adopted “a substantial
    compliance test for the FSIA[],” but a review of its cases shows that it has only applied
    that test to a § 1608(a) service of process challenge where the plaintiff personally sent
    service of process rather than requesting the clerk of court to do so. See Peterson v.
    Islamic Republic of Iran, 
    627 F.3d 1117
    , 1129–30 (9th Cir. 2010); Straub v. A P Green
    Inc., 
    38 F.3d 448
    , 453–54 (9th Cir. 1994).
    23
    location” or “[t]o direct (a written communication) to a specific person or destination,”
    “[t]o direct to the attention of, communicate to”); dispatch, Oxford English Dictionary
    (defining the verb “dispatch” as “[t]o send off post-haste or with expedition or
    promptitude (a messenger, message, etc., having an express destination). The word
    regularly used for the sending of official messengers, and messages, of couriers, troops,
    mails, telegrams, parcels, express trains, packet-boats, etc.”). As we discuss below, our
    sister circuits have held that subsection (a)(3) is satisfied where process is mailed to the
    head of the ministry of foreign affairs at the ministry of foreign affairs’ address in the
    foreign state. See, e.g., Gates v. Syrian Arab Republic, 
    646 F.3d 1
    , 4–5 (D.C. Cir. 2011);
    
    Peterson, 627 F.3d at 1129
    . But Kumar contends that subsection (a)(3)’s silence as to
    geographic location for the mailing means that the statute does not require service to be
    sent to the foreign state and that it allows service delivered to the foreign state’s embassy
    in the United States.
    Although Kumar does not advocate such an extreme position, the view that
    subsection (a)(3) only requires a particular recipient, and not a particular location, would
    allow the clerk of court to send service to any geographic location so long as the head of
    the ministry of foreign affairs of the defendant foreign state is identified as the intended
    recipient. That view cannot be consistent with Congress’ intent: otherwise, service via
    General Delivery in Peoria, Illinois could be argued as sufficient.
    While it is true that subsection (a)(3) does not specify delivery only at the foreign
    ministry in the foreign state’s capital, Kumar’s premise that subsection (a)(3) does not
    require service to be sent there does not lead to his conclusion that service at the embassy
    24
    satisfies the obligation under subsection (a)(3). The statute is simply ambiguous as to
    whether delivery at the foreign state’s embassy meets subsection (a)(3) given that while
    the head of a ministry of foreign affairs generally oversees a foreign state’s embassies,
    the foreign minister is rarely—if ever—present there. Serving the foreign minister at a
    location removed from where he or she actually works is at least in tension with
    Congress’ objective, even if it is not strictly prohibited by the statutory language.
    Because the plain language of subsection (a)(3) does not fully resolve the issue
    before us, we turn elsewhere for guidance as to Congress’ intent. See Lee v. Norfolk S.
    Ry. Co., 
    802 F.3d 626
    , 631 (4th Cir. 2015) (“[I]f the text of a statute is ambiguous, we
    look to other indicia of congressional intent such as the legislative history to interpret the
    statute.”). Here, the FSIA’s legislative history, coupled with the United States’
    obligations under the Vienna Convention, as well as the “great weight” accorded the
    State Department’s interpretation of such foreign treaty matters, lead us to the conclusion
    that subsection (a)(3) is not satisfied by delivery of process to a foreign state’s embassy.
    To understand this interplay, we first observe the obligation under the Vienna
    Convention that “[t]he premises of the mission shall be inviolable. The agents of the
    receiving State may not enter them, except with the consent of the head of the mission.” 7
    7
    The Vienna Convention sets out certain privileges and immunities governing
    diplomatic relations between States, including those governing permanent diplomatic
    missions. The “‘premises of the mission’ are the buildings or parts of buildings and the
    land ancillary thereto, irrespective of ownership, used for the purposes of the mission
    including the residence of the head of the mission.” Vienna 
    Convention, supra
    art. 1(i).
    25
    Vienna 
    Convention, supra
    art. 22, ¶ 1. Elsewhere, the Vienna Convention protects the
    inviolability of diplomatic agents. See 
    id. art. 29.
    8
    The House Judiciary Committee Report regarding the enactment of § 1608(a)
    shows that the statute is meant to account for the United States’ rights and obligations
    under the Vienna Convention. See H.R. Rep. No. 94–1487 (1977), as reprinted in 1976
    U.S.C.C.A.N. 6604. The FSIA—including § 1608 in its present form—was first enacted
    in 1976, four years after the Vienna Convention entered into force for the United States.
    See Tabion v. Mufti, 
    73 F.3d 535
    , 538 n.5 (4th Cir. 1996). Congress knew and considered
    the Convention’s obligations in drafting the FSIA. Specifically, the first draft of the bill
    allowed for service on a foreign state by “registered or certified mail . . . to the
    ambassador or chief of mission of the foreign state.” S. 566, 93d Cong. § 1608 (2d Sess.
    1973). The Department of State recommended removing that option based on its view
    that this method of service would violate Article 22 of the Vienna Convention. See H.R.
    Rep. No. 94–1487, at 26, as reprinted in 1976 U.S.C.C.A.N., at 6625; 71 Dep’t of State
    Bull. 458, 458–59 (1974).
    The House Report also took “[s]pecial note” of a “means . . . currently in use in
    attempting to commence litigation against a foreign state.” H.R. Rep. No. 94–1487, at 26,
    as reprinted in 1976 U.S.C.C.A.N., at 6625. Describing “the mailing of a copy of the
    8
    The United States is a signatory to the Vienna Convention and thus bound by its
    terms. See Vienna 
    Convention, supra
    Presidential Proclamation (“I, Richard Nixon,
    President of the United States of America, proclaim and make public the Convention and
    the Optional Protocol to the end that they shall be observed and fulfilled with good faith
    on and after December 13, 1972 by the United States of America[.]”).
    26
    summons and complaint to a diplomatic mission of the foreign state” as a means of
    serving process that was “of questionable validity,” the House Report states that
    “[s]ection 1608 precludes this method [of service] so as to avoid questions of
    inconsistency with section 1 of article 22 of the Vienna Convention on Diplomatic
    Relations[.]” 
    Id. (emphases added).
    The Report then reiterates “[s]ervice on an embassy
    by mail would be precluded under this bill.” 
    Id. (emphasis added).
    Thus, the House
    Report confirms that Congress did not intend § 1608 to allow for the mailing of service
    “to” or “on” a diplomatic mission as such a method would transgress the treaty
    obligations of the United States under the Vienna Convention.
    In previously interpreting other provisions of the Vienna Convention, we have
    recognized that it “should be construed to give effect to the intent of the signatories,”
    considering both its language and “the context in which the words were used.” 
    Tabion, 73 F.3d at 537
    . Moreover, “[t]reaties generally are liberally construed.” 
    Id. The question
    then becomes whether the Vienna Convention’s inviolability provision prohibits the
    application of subsection (a)(3) in the manner that allows service of process as Kumar
    executed in this case: service delivered to the foreign nation’s embassy in the United
    States. We conclude the Vienna Convention does exactly that.
    Kumar contends there is a dispositive difference for purposes of subsection (a)(3)
    when an embassy itself is served at the embassy’s address (which Kumar agrees would
    violate the Vienna Convention) and when the head of the ministry of foreign affairs is
    served at the embassy’s address (which Kumar contends does not violate the Vienna
    Convention). We fail to discern any meaningful distinction here. In the first instance,
    27
    both the embassy and its address are used in an attempt to serve the foreign state; in the
    second, the embassy address is used as the head of the ministry of foreign affairs’ address
    in an attempt to serve the foreign state. In both cases, a plaintiff has relied on the foreign
    states’ embassy as the vehicle for effectuating service of process on the foreign state.
    Either action impinges upon the unique characteristics of a diplomatic mission
    recognized and protected by the Vienna Convention and casts the embassy in the role as
    agent for service of process. Any distinction between service “on” the embassy or “via”
    the embassy thus seems a meaningless semantic distinction. 9
    In foreign affairs matters such as we consider here, we afford the view of the
    Department of State “substantial deference.” See Abbott v. Abbott, 
    560 U.S. 1
    , 
    130 S. Ct. 1983
    , 1993 (2010) (“It is well settled that the Executive Branch’s interpretation of a
    treaty is entitled to great weight.”); 
    Tabion, 73 F.3d at 538
    (“Substantial deference is due
    to the State Department’s conclusion” about the meaning of a treaty’s provisions). This
    judicial deference stems in part from the Constitution’s grant to the Executive Branch—
    not the Judicial Branch—of broad oversight over foreign affairs. Compare U.S. Const.
    art. 2, § 2, cl. 2, and § 3 (reserving to the Executive Branch the ability to “make Treaties”
    9
    The Vienna Convention allows “the head of the mission” to waive the
    inviolability of the premises. See Vienna 
    Convention, supra
    art. 22, ¶ 1 (“The agents of
    the receiving State may not enter [the premises of the mission], except with the consent
    of the head of the mission.”). Here, however, there is no evidence in the record to suggest
    that the Sudanese Ambassador did so. Simple acceptance of the certified mailing from the
    clerk of court does not demonstrate a waiver. That conclusion follows all the more
    strongly because the signature does not appear to be that of the Ambassador.
    Furthermore, no record document shows Sudan’s Ambassador has authorized waiver as a
    general matter or for purposes of service in this case.
    28
    and “receive Ambassadors and other public Ministers”), with U.S. Const. art. 3
    (containing no similar oversight of foreign affairs). In this case, the State Department
    contends that service at an embassy does not satisfy subsection (a)(3) and is inconsistent
    with the United States’ obligations under the Vienna Convention. See Br. for the United
    States as Amicus Curiae in Supp. of Reversal 11 (“There is an international consensus
    that a litigant’s service of process through mail or personal delivery to a foreign mission
    is inconsistent with the inviolability of the mission enshrined in” Article 22 of the Vienna
    Convention).
    Relatedly, the Court properly considers the diplomatic interests of the United
    States when construing the Vienna Convention and the FSIA. See Persinger v. Islamic
    Republic of Iran, 
    729 F.2d 835
    , 841 (D.C. Cir. 1984) (noting that, in construing the FSIA,
    courts should consider the United States’ interest in reciprocal treatment abroad). The
    United States has represented that it routinely “refuses to recognize the propriety of a
    private party’s service through mail or personal delivery to a United States embassy.” Br.
    for the United States as Amicus Curiae in Supp. of Reversal 13. The following example
    illustrates the wisdom of deferring to the State Department’s interpretation in this area:
    As noted, citing the Vienna Convention’s provisions, the Secretary of State “routinely
    refuses to recognize” attempts to serve process on the United States by mail sent to U.S.
    embassies in foreign states. See Br. for the United States as Amicus Curiae in Supp. of
    Reversal 13–14. The legitimacy and sustainability of that position would be compromised
    were we to countenance Kumar’s method of serving process to the Sudanese embassy.
    Why would a foreign judiciary recognize the United States’ interpretation of the Vienna
    29
    Convention when it comes to rejecting service of process via its own embassies if that
    same method for purposes of serving process on foreign states were permitted in the
    United States? Clearly, the United States cannot expect to receive treatment under the
    Vienna Convention that its own courts do not recognize in similar circumstances
    involving foreign states. This dilemma is avoided by the construction of subsection (a)(3)
    urged by the State Department. We find its longstanding policy and interpretation of
    these provisions authoritative, reasoned, and entitled to great weight.
    In view of the ambiguity in § 1608(a)(3) as to the place of service, we conclude
    the legislative history, the Vienna Convention, and the State Department’s considered
    view to mean that the statute does not authorize delivery of service to a foreign state’s
    embassy even if it correctly identifies the intended recipient as the head of the ministry of
    foreign affairs. Put another way, process is not properly “addressed and dispatched to”
    the head of the ministry of foreign affairs as required under § 1608(a)(3) when it is
    delivered to the foreign state’s embassy in Washington, D.C.
    We recognize that this holding adds to the existing tension between the courts of
    appeals’ interpretations of § 1608(a)(3), but it aligns with the greater weight of those
    holdings. For instance, it is consistent with the approaches taken in the D.C. and Seventh
    Circuits. Although it has not been confronted with the precise issue raised in this case, the
    D.C. Circuit has suggested that § 1608(a)(3) requires service on the head of the ministry
    of foreign affairs in the foreign state. See Barot v. Embassy of the Republic of Zam., 
    785 F.3d 26
    , 28, 30 (D.C. Cir. 2015) (noting that the district court rejected plaintiff’s attempt
    to serve process at the Zambian Embassy “in Washington D.C., rather than at the
    30
    Ministry of Foreign Affairs in Lusaka, Zambia, as the Act required” and remanding to the
    district court so the plaintiff had the opportunity “to effect service pursuant to [28 U.S.C.
    §] 1608(a)(3)” by having the clerk of court send service “to the head of the ministry of
    foreign affairs in Lusaka, Zambia, whether identified by name or title, and not to any
    other official or agency”). Similarly, the Seventh Circuit observed that the Vienna
    Convention and § 1608 both prohibited a plaintiff from effectuating service under
    subsection (b)(3)’s catchall provision by serving process on a foreign company “wholly
    owned by the Belarusian government” by delivering it to the Belarusian ambassador at
    the embassy in Washington, D.C. Autotech Techs. LP v. Integral Research & Dev. Corp.,
    
    499 F.3d 737
    , 739, 749–50 (7th Cir. 2007) (holding “service through an embassy is
    expressly banned both by an international treaty to which the United States is a party and
    by U.S. statutory law” because the treaty prohibits service on a diplomatic officer and §
    1608 does not authorize service of process on an ambassador (emphasis added)). 10
    Our holding conflicts with the view of the Second Circuit, which has held that
    serving Sudan’s head of the ministry of foreign affairs in a package that was delivered by
    certified mail to the Sudanese embassy in Washington, D.C., satisfies § 1608(a)(3).
    Harrison v. Republic of Sudan (Harrison I), 
    802 F.3d 399
    , 402–06 (2d Cir. 2015), reh’g
    10
    The United States contends the Fifth Circuit has also taken this view of
    § 1608(a)(3). But the facts of Magness bear little relation to what occurred here. There,
    the plaintiffs attempted to serve process by sending the “complaint to the Texas Secretary
    of State for forwarding to Boris Yeltsin” and “directly to the Russian Deputy Minister of
    Culture.” 
    Magness, 247 F.3d at 613
    . The plaintiffs in Magness never attempted to serve
    process “through the Ministry of Foreign Affairs,” 
    id., but the
    Fifth Circuit did not
    address the physical location where such service could be sent.
    31
    denied, 
    838 F.3d 86
    (Harrison II) (2d Cir. 2016) (denying petition for rehearing
    following further briefing and argument, and elaborating on the reasons for affirmance).
    The Second Circuit concluded “principles of mission inviolability and diplomatic
    immunity are [not] implicated” where service is made “via the embassy address.”
    Harrison 
    I, 802 F.3d at 405
    ; see also Harrison 
    II, 838 F.3d at 94
    (distinguishing between
    service “on the Minister of Foreign Affairs at the foreign mission” and service “on the
    foreign mission itself or the ambassador”). For the reasons we’ve already explained, we
    find the Second Circuit’s reasoning weak and unconvincing. 11 12
    Several additional grounds the Second Circuit relied on merit brief discussion as
    well. First, after acknowledging § 1608(a)(3)’s silence as to geographic location, the
    court noted that “[i]f Congress had wanted to require that the mailing be sent to the head
    11
    The distinction Kumar advances, and accepted by the Second Circuit in
    Harrison, rests on the artificial, non-textual distinction between service “on” the embassy
    and “via” the embassy. As noted earlier, we find no such distinction for purposes of
    subsection (a)(3). In both cases, the embassy is the de facto agent for service of process,
    something the Vienna Convention does not allow absent a waiver of mission
    inviolability. Further, although the Second Circuit acknowledged the State Department’s
    view is to be afforded “great weight,” Harrison 
    II, 838 F.3d at 95
    , it summarily rejected
    that position, which seems to accord the State Department’s view no weight at all. In
    contrast, the position we adopt in this case respects the “great weight” the State
    Department’s view merits.
    12
    A petition for certiorari in Harrison is currently pending before the Supreme
    Court, and the question presented squarely raises the issue of whether subsection (a)(3)
    and the Vienna Convention allow service of process “by mail addressed and dispatched
    to the head of the foreign state’s ministry of foreign affairs ‘via’ or in ‘care of’ the
    foreign state’s diplomatic mission in the United States.” Pet. for a Writ of Cert. at i,
    Republic of Sudan v. Harrison, No. 16-1094 (U.S. Mar. 9, 2017). Shortly before we heard
    oral argument in this case, the Supreme Court invited the Solicitor General to file a brief
    expressing the views of the United States. Republic of Sudan v. Harrison, 
    138 S. Ct. 293
    (2017) (mem.). At present, the Solicitor General has not filed its brief.
    32
    of the ministry of foreign affairs in the foreign country, it could have said so. In
    § 1608(a)(4), for example, Congress specified that the papers be mailed to the Secretary
    of State in Washington, District of Columbia[.]” Harrison 
    I, 802 F.3d at 404
    ; accord
    Harrison 
    II, 838 F.3d at 91
    (“If Congress had wanted to require that the mailing be sent
    to the minister of foreign affairs at the principal office of the ministry in the foreign
    country, it could have said so—but it did not.”). We do not find this point to be
    persuasive given that subsection (a)(4) directs attention to one known location for one
    country—the United States—and so can be easily identified. See 28 U.S.C. § 1608(a)(4).
    Second, the Second Circuit observed that requiring process “to a ministry of
    foreign affairs in the foreign country, makes little sense from a reliability perspective and
    as a matter of policy” given the reliability of a diplomatic pouch. Harrison 
    I, 802 F.3d at 406
    ; accord Harrison 
    II, 838 F.3d at 90
    & n.3 (approving of service on an embassy
    because such service “could reasonably be expected to result in delivery to the intended
    person,” as the embassy “is the nerve center for a country’s diplomatic affairs within the
    borders of another nation”). This misses the mark for multiple reasons. Reliability and
    policy concerns have no role when considering what the text of the statute—construed in
    light of the Vienna Convention—means. Subsection (a)(3) requires plaintiffs to attempt
    service by mail “requiring a signed receipt,” but leaves the specific use of certified mail
    or other method open to take into account concerns about reliability of service on a
    particular foreign state. Moreover, § 1608(a) specifically contemplates that service via
    subsection (a)(3) may not be possible in every foreign state, as recognized by subsection
    (a)(4), which allows for service under the alternative of using diplomatic channels. If,
    33
    after thirty days, a plaintiff is unable to effectuate service pursuant to subsection (a)(3),
    he or she can turn to subsection (a)(4). That is the subsection that Congress intended
    plaintiffs to use to take advantage of the reliability and security of the diplomatic pouch.
    Further, the method to effectuate service of process the United States undertakes
    does not violate the Vienna Convention because it respects international norms of
    communication via diplomatic channels. See Oct. 26, 2017, Letter from the United States
    as Amicus Curiae 1–2 (“When transmitting legal process through diplomatic channels,
    the State Department’s typical practice is for the United States’ embassy in the foreign
    state to deliver the papers to the state’s foreign ministry. In some unusual circumstances,
    or if the foreign state so requests, the State Department will transmit process to a foreign
    state’s embassy in the United States. In either case, the State Department transmits the
    papers under cover of a diplomatic note to the foreign state. . . . [T]his transmission of
    legal papers from one executive to another is considered to be communication through
    diplomatic channels.” (emphasis added)). Certified mail sent from the clerk of court to
    the head of the ministry of foreign affairs at the foreign state’s embassy is not of the same
    level and protocol and does not similarly respect the inviolability of the embassy for
    purposes of complying with the Vienna Convention.
    III.
    Because the attempted service of process in this case did not comply with the
    FSIA’s statutory requirements, the district court lacked personal jurisdiction over Sudan
    and could not enter judgment against it. See 28 U.S.C. § 1330(b) (“Personal jurisdiction
    34
    over a foreign state shall exist as to every claim for relief over which the district courts
    have jurisdiction . . . where service has been made under [28 U.S.C. § 1608(a)].”); see
    also Ruhrgas AG v. Marathon Oil Co., 
    526 U.S. 574
    , 584 (1999) (“Personal
    jurisdiction . . . is an essential element of the jurisdiction of a district court, without which
    the court is powerless to proceed to an adjudication.”). For that reason, the judgments
    entered against Sudan are void.
    We therefore reverse the district court’s denial of Sudan’s motion to vacate the
    entry of judgment, vacate the judgments against it, and remand to the district court with
    instructions to allow Kumar the opportunity to perfect service of process in a manner
    consistent with this opinion.
    REVERSED IN PART,
    VACATED IN PART,
    AND REMANDED WITH INSTRUCTIONS
    35