Chitlik v. Hhs
CourtCourt of Appeals for the Federal Circuit
Date FiledAugust 10, 2026
Docket25-1804
StatusPublished
📰 News Coverage: Read the LAWS.com news report on this case
Full Opinion
Case: 25-1804 Document: 50 Page: 1 Filed: 08/10/2026
United States Court of Appeals
for the Federal Circuit
______________________
LAURENCE CHITLIK,
Petitioner-Appellant
v.
SECRETARY OF HEALTH AND HUMAN
SERVICES,
Respondent-Appellee
______________________
2025-1804
______________________
Appeal from the United States Court of Federal Claims
in No. 1:22-vv-01790-RAH, Judge Richard A. Hertling.
______________________
Decided: August 10, 2026
______________________
GREG TINCH, Tinch Law Firm PC, College Park, MD,
argued for petitioner-appellant.
JAY TRAVIS WILLIAMSON, Torts Branch, Civil Division,
United States Department of Justice, Washington, DC, ar-
gued for respondent-appellee. Also represented by LARA A.
ENGLUND, JONATHAN D. GUYNN, HEATHER LYNN
PEARLMAN, BRETT SHUMATE.
______________________
Before PROST, REYNA, and STARK, Circuit Judges.
Case: 25-1804 Document: 50 Page: 2 Filed: 08/10/2026
2 CHITLIK v. HHS
PROST, Circuit Judge.
Laurence Chitlik, who was at the time proceeding pro
se, mailed a petition for compensation under the National
Vaccine Injury Compensation Program (“the Program”) via
certified first-class mail to the U.S. Court of Federal Claims
ten days before the expiration of the statute of limitations.
The petition was received and filed one day beyond the lim-
itations period due to U.S. Postal Service (“USPS”) delay,
and Mr. Chitlik sought application of equitable tolling. The
special master denied Mr. Chitlik’s request, finding that he
was not reasonably diligent in pursuing his claim and that
the USPS delay was not an extraordinary circumstance
that prevented timely filing. The Court of Federal Claims
affirmed the special master’s finding regarding a lack of
reasonable diligence but did not address the issue of ex-
traordinary circumstances. We reverse the finding that
Mr. Chitlik failed to exercise reasonable diligence. We fur-
ther vacate the special master’s finding of no extraordinary
circumstances and remand for further proceedings on that
issue.
BACKGROUND
The relevant facts of this case are undisputed.
Mr. Chitlik alleges to have suffered an injury compensable
under the Program on December 6, 2019. The statute of
limitations for such a claim under the Program is
36 months from onset of the first symptom, 42 U.S.C.
§ 300aa-16, meaning that the latest date Mr. Chitlik could
file a claim was December 6, 2022.
On November 26, 2022—ten days (eight business
days 1) before the expiration of the statute of limitations—
Mr. Chitlik, then pro se, mailed a petition from his local
1 We use “business days” to refer to the USPS’s days
of operation, which generally span Monday through Satur-
day.
Case: 25-1804 Document: 50 Page: 3 Filed: 08/10/2026
CHITLIK v. HHS 3
USPS office in Cambridge, Maryland, to the Court of Fed-
eral Claims via certified first-class mail. The approximate
distance his petition needed to travel was eighty-five miles.
USPS provided a five-business-day delivery commitment
for its first-class mail service. For reasons unknown,
Mr. Chitlik’s petition did not arrive at the Court of Federal
Claims until the morning after the statute of limitations
expired. The petition was filed the same day.
After preliminary proceedings related to the timeliness
of the petition, Mr. Chitlik, now represented by counsel,
moved for application of equitable tolling, alleging that two
extraordinary circumstances prevented timely filing:
(1) “the USPS failing to meet its delivery commitment
which resulted in a four . . . business day delay beyond the
1-5 business day delivery commitment”; and (2) “the global
COVID-19 pandemic, which precipitated and/or exacer-
bated the USPS failure to meet its 1-5 business day deliv-
ery commitment.” App’x 61, 64–68. Mr. Chitlik contended
that he acted with reasonable diligence in pursuing his
claim by mailing the petition a full eight business days be-
fore the expiration of the statute of limitations.
App’x 61–64.
The special master denied the request, finding that
Mr. Chitlik had not established either necessary prong to
justify equitable tolling—i.e., that Mr. Chitlik was not rea-
sonably diligent in pursing his claim and that no extraor-
dinary circumstance caused the late filing. Chitlik v. Sec’y
of HHS, No. 22-1790V, 2024 WL 5346731 (Fed. Cl. Spec.
Mstr. Dec. 19, 2024) (“Special Master’s Decision”).
Mr. Chitlik objected to the special master’s determina-
tion by filing a motion for review with the Court of Federal
Claims. App’x 89–114. In that motion, Mr. Chitlik ad-
vanced the same arguments regarding his diligent mailing
of the petition but offered two additional allegedly extraor-
dinary circumstances: (1) that the Court of Federal Claims’
“extraordinary rulemaking in view of the COVID-19 global
health emergency is an extraordinary circumstance”; and
Case: 25-1804 Document: 50 Page: 4 Filed: 08/10/2026
4 CHITLIK v. HHS
(2) that “[Mr. Chitlik’s] intermittent mental incapacity
while under general anesthesia is an extraordinary circum-
stance.” App’x 108–12. In response, the government ar-
gued that these “extraordinary circumstances” were
waived pursuant to Vaccine Rule 8(f), as Mr. Chitlik had
not raised them before the special master. App’x 132–33.
The Court of Federal Claims affirmed the special mas-
ter’s finding that Mr. Chitlik was not reasonably diligent
and, on that basis and without addressing extraordinary
circumstances, affirmed the special master’s decision and
dismissed the petition. Chitlik v. Sec’y of HHS, No. 22-
1790V, 2025 WL 947455 (Fed. Cl. Mar. 27, 2025) (“Court of
Federal Claims’ Decision”). Mr. Chitlik timely appealed to
this court. We have jurisdiction under 28 U.S.C.
§ 1295(a)(3).
DISCUSSION
“In Vaccine Act cases, we review a ruling by the Court
of Federal Claims de novo, applying the same standard
that it applies in reviewing the decision of the special mas-
ter.” Moberly ex rel. Moberly v. Sec’y of HHS, 592 F.3d
1315, 1321 (Fed. Cir. 2010). “We review factual findings
under the arbitrary and capricious standard, and we re-
view legal rulings to determine whether they are ‘not in ac-
cordance with law.’” Id. (quoting Munn v. Sec’y of HHS,
970 F.2d 863, 870 n.10 (Fed. Cir. 1992)). Where “the mate-
rial facts are not in dispute this court has treated the ques-
tion of the availability of equitable tolling as a matter of
law.” Dobyns v. United States, 101 F.4th 839, 842
(Fed. Cir. 2024) (cleaned up).
A party seeking to invoke equitable tolling has the bur-
den to prove both “(1) that he has been pursuing his rights
diligently, and (2) that some extraordinary circumstance
stood in his way and prevented timely filing.” Menomi-
nee Indian Tribe of Wis. v. United States, 577 U.S. 250, 255
(2016). Mr. Chitlik contends that the special master erred
Case: 25-1804 Document: 50 Page: 5 Filed: 08/10/2026
CHITLIK v. HHS 5
as a matter of law in concluding that he failed to satisfy
either prong. We address each in turn.
I
“The diligence required for equitable tolling purposes
is reasonable diligence, not maximum feasible diligence.”
Holland v. Florida, 560 U.S. 631, 653 (2010) (cleaned up).
A
The special master’s analysis of the reasonable dili-
gence prong was as follows:
[Mr. Chitlik] could have avoided an untimely
delivery of his petition by choosing overnight
delivery or Priority Mail Express with a next-
day to two-day delivery guarantee. I find no
significance in the fact that [Mr. Chitlik]’s pe-
tition was one day late versus three or four
days late. Choosing a guaranteed delivery
service rather than a “commitment” standard
a courier aspires to uphold would have guar-
anteed a timely delivery. [Mr. Chitlik] did not
so choose.
Special Master’s Decision, 2024 WL 5346731, at *5.
Mr. Chitlik contends that the special master imposed a “de-
facto overnight-delivery requirement” and improperly ap-
plied a standard of “maximum feasible diligence,” not “rea-
sonable diligence.” Appellant’s Br. 8, 13–20. The
government argues that the special master adopted no
such requirement and instead found Mr. Chitlik not rea-
sonably diligent based upon an analysis of all the facts.
The government further contends that, in any event, re-
quiring use of an overnight-delivery service demands no
more than reasonable diligence. Appellee’s Br. 12–15. We
agree with Mr. Chitlik.
Case: 25-1804 Document: 50 Page: 6 Filed: 08/10/2026
6 CHITLIK v. HHS
1
First, contrary to the government’s assertions, it is ap-
parent that the special master failed to conduct a case-spe-
cific analysis of all the relevant facts. Instead, the special
master appears to have adopted a bright-line rule whereby
use of a non-“guaranteed” delivery method precludes a
finding of reasonable diligence. That per se rule conflicts
with the Supreme Court’s instruction that equitable tolling
must be determined “on a case-by-case basis.” Holland,
560 U.S. at 649–51 (reversing per se rule barring applica-
tion of equitable tolling and acknowledging “equity’s re-
sistance to rigid rules,” as well as “the need for flexibility”
and “for avoiding mechanical rules”) (cleaned up). It also
conflicts with this court’s jurisprudence, which has decried
the use of categorical bars to equitable tolling. For in-
stance, in James v. Wilkie, we concluded that the Veterans
Court erred when “it made a categorical determination
that a fallen mailbox flag is not entitled to equitable tolling
but is rather an ordinary hazard of last-minute mailing
that could have been avoided but for [appellant]’s garden
variety neglect.” 917 F.3d 1368, 1373 (Fed. Cir. 2019)
(cleaned up). As we explained in the context of extraordi-
nary circumstances, and which is equally applicable here,
equitable tolling “necessarily requires a case-by-case anal-
ysis and not a categorical determination.” Id. Put another
way, “[u]se of a categorical determination for an equitable
tolling analysis finds no support in our precedent.” Id.
at 1375.
Here, the “reasonable diligence” prong required a case-
by-case analysis, which should have considered, among
other things, not only the choice of delivery method, but
also the date the petition was mailed, the projected time-
line for delivery (taking into account the distance the peti-
tion needed to travel), and the amount of time until
expiration of the statute of limitations at mailing. See
K. G. v. Sec’y of HHS, 951 F.3d 1374, 1382 (Fed. Cir. 2020)
(“[T]he reasonable diligence inquiry must . . . be based on a
Case: 25-1804 Document: 50 Page: 7 Filed: 08/10/2026
CHITLIK v. HHS 7
consideration of all relevant facts and circumstances.”).
The special master’s statement “find[ing] no significance in
the fact that [Mr. Chitlik]’s petition was one day late versus
three or four days late” evinces the lack of an adequate
case-specific analysis. Special Master’s Decision, 2024 WL
5346731, at *5. An appropriate analysis should have con-
sidered the significance to be afforded to Mr. Chitlik’s mail-
ing of the petition ten days before the deadline, the
projected delivery date, and the protracted length of USPS
delay, which together culminated in the petition arriving
only a single day late. The special master’s failure to con-
sider all relevant facts and circumstances, such as these,
was legal error.
2
Second, the special master further erred in imposing a
standard higher than the requisite reasonable diligence by
requiring selection of a “guaranteed” delivery service. 2
Holland, 560 U.S. at 653 (“The diligence required for equi-
table tolling purposes is reasonable diligence, not maxi-
mum feasible diligence.” (cleaned up)). The rules in place
at the time of filing required pro se petitioners to submit
their petition “either through the U.S. Mail, or by deposit
in the court’s night box.” General Order Suspending Paper
2 It is undisputed that such “guaranteed” delivery
services only provide a money-back guarantee for late de-
livery, not a delivery guarantee. See, e.g., Oral Arg.
at 19:10–58, No. 25-1804, https://www.cafc.uscourts.gov/
oral-arguments/25-1804_07062026.mp3 (counsel for the
government conceding this point). Indeed, even the Rasp-
berry and Mojica cases that the special master analyzed
elsewhere in her decision (see infra § II) demonstrate that
a “delivery guarantee” is a misnomer. Special Master’s De-
cision, 2024 WL 5346731, at *5 (discussing cases where pe-
titioners utilized “guaranteed delivery” services and
delivery was delayed).
Case: 25-1804 Document: 50 Page: 8 Filed: 08/10/2026
8 CHITLIK v. HHS
Filing Requirement in Pro Se Cases at 2 (Fed. Cl. Mar. 18,
2020). Mr. Chitlik chose the former option and mailed his
petition via certified first-class mail ten days (eight busi-
ness days) prior to the expiration of the statute of limita-
tions. To require the purchase of a “next-day to two-day
delivery guarantee” ten days before the deadline demands
from petitioners far more than reasonable diligence.
The government urges this court to follow other circuits
that have found delays in “regular” mail insufficient to jus-
tify equitable tolling. Appellee’s Br. 13–15 (citing Robinson
v. DHS, 71 F.4th 51, 59 (D.C. Cir. 2023); Sandvik v. United
States, 177 F.3d 1269, 1272 (11th Cir. 1999); Talamantes-
Penalver v. INS, 51 F.3d 133, 136 (8th Cir. 1995)). We are
unconvinced.
In Robinson, the appellant mailed the complaint via
“standard mail” four days before the statutory deadline.
Robinson, 71 F.4th at 58–59. The applicable district court
rule, however, required pro se litigants to submit com-
plaints “by sending the filing via email to the Court’s email
address” or “by date-stamping and depositing papers in
drop boxes located at the entrance to the Courthouse.” Id.
(cleaned up). The D.C. Circuit faulted the appellant for
failing to explain why he did not use one of the two author-
ized filing options or otherwise explain the untimely filing
and, on those facts, found that equitable tolling did not ap-
ply. Id. at 59.
Sandvik and Talamantes-Penalver, both of which pre-
date the Supreme Court’s articulation of the reasonable dil-
igence standard in Holland, are likewise distinguishable
from the present case.
In Sandvik, the appellant’s attorney mailed the peti-
tion in question from Atlanta to Miami (over 600 miles) five
days before the expiration of the statute of limitations.
Sandvik, 177 F.3d at 1270–71. The Eleventh Circuit de-
clined to apply equitable tolling because “[appellant]’s
counsel could have avoided [the untimely filing] by mailing
Case: 25-1804 Document: 50 Page: 9 Filed: 08/10/2026
CHITLIK v. HHS 9
the motion earlier or by using a private delivery service or
even a private courier.” Id. at 1272. In so reasoning, the
Eleventh Circuit did not deny that using regular mail could
be a reasonably diligent method if utilized early enough.
The same is true for Talamantes-Penalver, which did
not address equitable tolling but instead resolved a due-
process challenge to a statutory deadline for filing a notice
of appeal. Talamantes-Penalver, 51 F.3d at 134. There,
appellant’s attorney mailed the petition only three days be-
fore the deadline. Id. While the Eighth Circuit recognized
that the appellant had “assumed the risk of regular mail
delivery,” it also noted that the appellant could have
mailed the petition earlier to “allow[] eight days for deliv-
ery by regular mail,” id. at 136—an acknowledgement,
akin to Sandvik, that using regular mail can be a reasona-
bly diligent method depending on the circumstances.
In short, each of the government’s cases from other cir-
cuits is factually distinct, and none set forth the rule that
a finding of reasonable diligence is precluded in all in-
stances where regular mail is used. Nor would such a rule
be appropriate in view of Holland’s requirement to perform
a case-by-case analysis and its instruction that only “rea-
sonable diligence, not maximum feasible diligence,” is re-
quired. Holland, 560 U.S. at 653 (cleaned up). Therefore,
we conclude that the special master’s imposition of a “guar-
anteed”-delivery requirement demands more than reason-
able diligence and is not in accordance with law.
B
The Court of Federal Claims failed to address the spe-
cial master’s errors discussed above and instead offered an
additional justification for finding that Mr. Chitlik was not
reasonably diligent. We are unpersuaded.
Specifically, the Court of Federal Claims faulted
Mr. Chitlik for “failing to monitor the status of the delivery
of his petition through the tracking option for which he had
Case: 25-1804 Document: 50 Page: 10 Filed: 08/10/2026
10 CHITLIK v. HHS
paid and failing to respond to the apparent delay in the de-
livery during the Postal Service’s peak mailing season.”
Court of Federal Claims’ Decision, 2025 WL 947455, at *6.
In the court’s view, a reasonably diligent person “would
have tracked his envelope and observed that there was no
record of its delivery as the deadline for filing the petition
grew ever closer,” and, “[u]pon realizing that the envelope
with the petition would apparently fail to arrive by the
deadline, a reasonably diligent person would have re-sent
the petition by guaranteed overnight delivery.” Id. at *5.
Based on this reasoning, the court determined that
Mr. Chitlik had failed to exercise reasonable diligence.
The Court of Federal Claims, like the special master,
demanded an impermissibly heightened level of diligence.
Given the short distance (around eighty-five miles) that
Mr. Chitlik’s petition needed to travel, a reasonably dili-
gent person in his position could have well expected the pe-
tition to arrive and be filed by the deadline—even if the
tracking information leading up to the deadline had not yet
confirmed delivery. To require a petitioner to parse the
tracking information and mail additional parallel petitions
before any meaningful indication that the original petition
would be untimely demands more than a “reasonable” level
of diligence. Additionally, as discussed above (supra
note 2), there is no actual guarantee that any subsequent
petition mailed via a “guaranteed” overnight delivery
would itself arrive in time. 3
3 We do not suggest that a failure to inquire as to the
status of a mailing will never be relevant. For example,
had Mr. Chitlik’s petition failed to arrive for multiple days
after the statute of limitations expired and had he taken no
action during that time, then the Court of Federal Claims’
reasoning may very well support a lack of reasonable dili-
gence. Those, however, are not the present facts. Nor, we
Case: 25-1804 Document: 50 Page: 11 Filed: 08/10/2026
CHITLIK v. HHS 11
For the foregoing reasons, we reject the Court of Fed-
eral Claims’ tracking requirement in this case as an im-
proper heightening of the “reasonable diligence” standard.
C
Having determined that the underlying decisions were
not in accordance with law, we next assess whether, on
these undisputed facts, Mr. Chitlik was reasonably diligent
in pursuing his claim. See Dobyns, 101 F.4th at 842
(“[W]hen the material facts are not in dispute this court has
treated the question of the availability of equitable tolling
as a matter of law.” (cleaned up)). We conclude he was.
Mr. Chitlik mailed his petition roughly eighty-five
miles from Maryland to Washington, D.C., via USPS first-
class mail ten days (eight business days) before the statute
of limitations expired. With USPS’s five-day nationwide
delivery commitment, as well as the short distance his pe-
tition needed to travel, Mr. Chitlik can hardly be faulted
for reasonably expecting that his choice of delivery method
would suffice. Indeed, by mailing his petition ten days be-
fore the deadline, Mr. Chitlik ensured that he could with-
stand even three days of delay past the end of the USPS’s
delivery commitment—a far cry from the appellants in Tal-
amantes-Penalver (mailing three calendar days before
deadline), Robinson (four days before), and Sandvik (five
days before). While a failure to monitor or act upon track-
ing information may counsel against reasonable diligence
in other circumstances, it has no bearing here where
stress, do we adopt a threshold requirement that petition-
ers in all cases must obtain tracking information to be con-
sidered reasonably diligent. Imposition of such a
categorical prerequisite would be difficult to square not
only with Holland but also the Court of Federal Claims’
own rules that allow submission through the U.S. Mail
without further restrictions—tracking-related or other-
wise.
Case: 25-1804 Document: 50 Page: 12 Filed: 08/10/2026
12 CHITLIK v. HHS
Mr. Chitlik’s petition arrived the morning after the statute
of limitations expired (and, as discussed above, there was
no meaningful indication beforehand that it would not
timely arrive). At that point, there was nothing more for
Mr. Chitlik to do other than to seek tolling of the deadline
that passed, which he did. To require more on these undis-
puted facts would be error.
Accordingly, we reverse the finding that Mr. Chitlik
was not reasonably diligent in pursuing his claim.
II
Having found that Mr. Chitlik was reasonably diligent,
we turn next to the question of extraordinary circum-
stances.
“[T]he second prong of the equitable tolling test is met
only where the circumstances that caused a litigant’s delay
are both extraordinary and beyond its control.” Menomi-
nee, 577 U.S. at 257 (emphasis in original). An extraordi-
nary circumstance serving as the basis for equitable tolling
“necessarily carries with it an element of causation.” Al-
dridge v. McDonald, 837 F.3d 1261, 1265 (Fed. Cir. 2016).
The special master’s analysis of the extraordinary cir-
cumstances prong was as follows:
[A] delay in regular mail is not an extraordi-
nary circumstance, and [Mr. Chitlik]
acknowledged in his filings that regular mail
delays are common. . . . This case is different
than Raspberry and Mojica because those pe-
titioners chose overnight delivery (a reliable
method of securing a timely delivery) whereas
[Mr. Chitlik] assumed the risk of regular mail
delivery services. . . . Further, [Mr. Chitlik]
has not provided sufficient evidence that the
COVID-19 pandemic substantially affected
the mail to cause an extraordinary circum-
stance.
Case: 25-1804 Document: 50 Page: 13 Filed: 08/10/2026
CHITLIK v. HHS 13
Special Master’s Decision, 2024 WL 5346731, at *5. 4 The
Court of Federal Claims did not reach the extraordinary
circumstances prong, having affirmed the special master’s
finding of no reasonable diligence. Court of Federal Claims’
Decision, 2025 WL 947455, at *6 n.5. On appeal, Mr. Chit-
lik contends, in part, that the special master erred in her
determination that “USPS’s failure to meet its delivery
commitment despite [Mr. Chitlik]’s timely submission”
could not constitute an extraordinary circumstance. Ap-
pellant’s Br. 10. 5 We agree with Mr. Chitlik that, under
the totality of circumstances, USPS’s delayed delivery of
his petition could be found to constitute an extraordinary
circumstance.
With respect to “extraordinary circumstances,” the spe-
cial master again applied a categorical rule—namely, that
“a delay in regular mail is not an extraordinary circum-
stance,” Special Master’s Decision, 2024 WL 5346731,
at *5—in contravention of precedent requiring a case-by-
case determination, Holland, 560 U.S. at 649–51; James,
4 See Raspberry v. Sec’y of HHS, 32 Fed. Cl. 777, 782
(1995) (applying equitable tolling); Mojica v. Sec’y of HHS,
102 Fed. Cl. 96, 100 (2011) (same).
5 On appeal, Mr. Chitlik devotes most of his argu-
ment on this prong to two additional allegedly extraordi-
nary circumstances—namely, (1) “the [Court of Federal
Claims’] COVID-19 emergency orders limiting filing op-
tions to mail delivery for 33 of the 36 months in his filing
window” and (2) “Petitioner’s documented periods of inca-
pacity during surgical interventions for life-threatening
conditions.” Appellant’s Br. 10, 21–27. The government
contends that Mr. Chitlik waived these arguments under
Vaccine Rule 8(f). Appellee’s Br. 22. These same argu-
ments were raised to the Court of Federal Claims.
App’x 108–12. We leave the issue of waiver for the Court
of Federal Claims on remand.
Case: 25-1804 Document: 50 Page: 14 Filed: 08/10/2026
14 CHITLIK v. HHS
917 F.3d at 1373–75. As just discussed, that is error. Ac-
cordingly, we vacate the special master’s finding of no ex-
traordinary circumstance.
CONCLUSION
We reverse the determination that Mr. Chitlik was not
reasonably diligent in pursuing his claim, vacate the spe-
cial master’s determination regarding no extraordinary cir-
cumstance, and remand to the Court of Federal Claims to
assess extraordinary circumstances in the first instance
under the correct legal standard articulated herein and for
other proceedings not inconsistent with this opinion. 6 In
doing so, the Court of Federal Claims should consider
(1) whether any of Mr. Chitlik’s extraordinary circum-
stance arguments were waived and (2) whether any non-
waived extraordinary circumstance arguments, taken
alone or in combination, constitute an extraordinary cir-
cumstance that justifies equitable tolling.
REVERSED-IN-PART, VACATED-IN-PART, AND
REMANDED
COSTS
Costs to Mr. Chitlik.
6 See Capizzano v. Sec’y of HHS, 440 F.3d 1317, 1328
(Fed. Cir. 2006) (remanding to the Court of Federal Claims
to determine whether petitioner had proven causation
based on the existing factual record); Althen v. Sec’y of
HHS, 418 F.3d 1274, 1281 (Fed. Cir. 2005) (“[B]ecause the
special master’s decision was not in accordance with law,
the trial court [is] permitted to review the evidence anew
and come to its own conclusion.” (citing 42 U.S.C. § 300aa-
12(e)(2)(B))). We leave it to the Court of Federal Claims,
after receiving the views of the parties, to decide whether
the matter should be decided by the special master. See
42 U.S.C. § 300aa-12(e)(2).