SEC. 2. ENHANCING PROTECTIONS FOR THE AVIATION 
COMMUNITY. 
(a) NTSB REVIEW OF APPLICATION FOR AIRMAN 
CERTIFICATE.—Section 44703(d) of title 49, United 
States Code, is amended— 
(1) by redesignating paragraphs (2) and (3) as 
paragraphs (3) and (4), respectively; and 
(2) by inserting after paragraph (1), the fol-
lowing new paragraph: 
‘‘(2) NTSB REVIEW.— 
‘‘(A) IN GENERAL.—In the case of an applica-
tion for the issuance of an airman medical certifi-
cate, the National Transportation Safety Board may 
review a denial that may not be considered a final 
denial by the Administrator when the Administrator 
has twice reconsidered the application and sustained 
a previous denial on that application. 
‘‘(B) DEEMED
DENIAL.—The Administrator’s 
failure to rule upon an application to reconsider the 
denial of issuance of an airman medical certificate 
within 60 days of the date on which the application 
to reconsider is submitted to the Administrator shall 
be deemed to be a denial of the application.’’. 
(b) VOLUNTARY SURRENDER OF AN AIRMAN MED-
ICAL CERTIFICATE.—Section 44703 of title 49, United 
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States Code, is amended by adding at the end the fol-
lowing new subsection: 
‘‘(l) VOLUNTARY SURRENDER OF AN AIRMAN MED-
ICAL CERTIFICATE.—An airman may voluntarily sur-
render an airman medical certificate issued under this sec-
tion for cancellation at any time, unless the certificate is 
subject to a Federal Aviation Administration order at the 
time of the voluntary surrender.’’. 
(c) APPEALS.—Section 44703(d)(1) of title 49, 
United States Code, is amended by striking ‘‘holds a cer-
tificate that’’ and all that follows through the period and 
inserting ‘‘holds a certificate that is suspended at the time 
of denial.’’. 
(d) REAPPLICATIONS.—Section 44709 of title 49, 
United States Code, is amended— 
(1) by redesignating subsection (f) as sub-
section (g); and 
(2) by inserting after subsection (e), the fol-
lowing new subsection: 
‘‘(f) REAPPLICATIONS.—Except as provided in sec-
tion 44710, any person whose certificate has been revoked 
by an order of the Administrator or the National Trans-
portation Safety Board may reapply for a certificate at 
any time following the revocation.’’. 
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(e) APPEAL OF SUSPENSION OR TERMINATION OF 
DELEGATION.—Section 44702(d) of title 49, United 
States Code, is amended by adding at the end the fol-
lowing: ‘‘Subsections (d), (e), and (f) of section 44709 
shall apply to a rescission of a delegation under this sub-
section in the same manner as those subsections apply to 
an order of the Administrator or the National Transpor-
tation Safety Board under that section.’’. 
SEC. 3. ACCOUNTABILITY FOR AIRCRAFT REGISTRATION 
NUMBERS. 
The Administrator of the Federal Aviation Adminis-
tration shall review the process of reserving aircraft reg-
istration numbers and enact appropriate changes to en-
sure the fair participation by the general public, including 
the implementation of readily available software to prevent 
any computer auto-fill systems from reserving aircraft reg-
istration numbers in bulk. 
SEC. 4. MITIGATING THE SPREAD OF AQUATIC INVASIVE 
SPECIES BY AIRCRAFT. 
(a) IN GENERAL.—Any person that holds a seaplane 
rating from the Administrator of the Federal Aviation Ad-
ministration and successfully completes a free online edu-
cation course on aquatic invasive species mitigation that 
is acceptable to the Secretary of the Interior may hold 
themselves out to the public as qualified to inspect aircraft 
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for aquatic invasive species and to take action to mitigate 
the spread of aquatic invasive species. 
(b) NO FURTHER REGULATORY OR ENFORCEMENT 
ACTION.—Any person that is qualified under subsection 
(a) or whose aircraft is inspected by a person qualified 
under subsection (a) and subject to the mitigation de-
scribed in subsection (a) shall not be subject to any fur-
ther regulatory or enforcement action by any Federal, 
State, local, or Tribal government for any action related 
to aquatic invasive species. 
(c) COURSES.—The Secretary of the Interior shall 
publish, and periodically revise, a list of acceptable courses 
on mitigating the spread of aquatic invasive species by air-
craft. 
(d) AQUATIC INVASIVE SPECIES.—For the purposes 
of this section, the term ‘‘aquatic invasive species’’ means 
aquatic organisms that invade ecosystems beyond their 
natural, historic range and whose presence may harm 
human health, native ecosystems, or commercial, agricul-
tural, or recreational activities dependent on these eco-
systems. 
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SEC. 5. MODIFICATION OF FEDERAL AVIATION ADMINIS-
TRATION TOWER MARKING REQUIREMENTS. 
Section 2110(b)(1)(A)(ii) of the FAA Extension, 
Safety, 
and 
Security 
Act 
of 
2016 
(49 
U.S.C. 
44718(b)(1)(A)(ii) note) is amended— 
(1) by redesignating subclauses (IX) and (X) as 
subclauses (X) and (XI), respectively; and 
(2) by inserting after subclause (VIII) the fol-
lowing: 
‘‘(IX) is located in a State that 
has enacted tower marking require-
ments according to the Federal Avia-
tion Administration’s recommended 
guidance for the voluntary marking of 
Meteorological 
Evaluation 
Towers 
(METs) erected in remote and rural 
areas that are less than 200 feet 
above ground level to enhance the 
conspicuity of the towers for low level 
agricultural operations in the vicinity 
of those towers.’’. 
SEC. 6. LIMITATION OF LIABILITY FOR CERTAIN INDIVID-
UALS DESIGNATED AS REPRESENTATIVES OF 
THE FEDERAL AVIATION ADMINISTRATION. 
(a) IN GENERAL.—Any individual designated by the 
Administrator of the Federal Aviation Administration 
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