S. 2503
ROTOR Act
Sponsor: Ted Cruz
21 cosponsors
- Amy Klobuchar
- Edward J. Markey
- Maria Cantwell
- Mark R. Warner
- Tammy Duckworth
- Tim Kaine
- Raphael G. Warnock
- Richard Blumenthal
- Chris Van Hollen
- John R. Curtis
- Lisa Blunt Rochester
- Peter Welch
- Cynthia M. Lummis
- Eric Schmitt
- Jerry Moran
- Marsha Blackburn
- Roger Marshall
- Shelley Moore Capito
- Ted Budd
- Tim Sheehy
- Todd Young
Official summary
Written by the Congressional Research Service.
Rotorcraft Operations Transparency and Oversight Reform Act or the ROTOR Act
This bill addresses aviation safety by increasing requirements for aircraft tracking and communication using Automatic Dependent Surveillance-Broadcast (ADS-B) technology and expanding oversight.
As background, ADS-B for broadcasting (Out) and receiving (In) transmits information (e.g., location and weather information) between aircraft and air traffic control.
Under the bill, aircraft must generally operate with ADS-B In equipment to provide the aircraft with location information of other aircraft and traffic advisories. Current law does not require this equipment.
Current Federal Aviation Administration (FAA) regulations allow aircraft performing a sensitive government mission to be excepted from requirements for using ADS-B Out equipment. This bill limits which flights may be considered sensitive government missions (e.g., not training flights) and requires additional reporting and notifications for the exception.
The Government Accountability Office must review the use of the ADS-B Out exception and the Office of the Inspector General (OIG) of the Department of Transportation must annually audit FAA oversight of operations that use the exception.
Further, the bill repeals a 2025 law that exempts certain military helicopters from the ADS-B Out requirements for the Washington, DC, metropolitan area.
The bill also requires
- the OIG of the Army to audit the Army’s coordination with the FAA,
- the FAA to establish an office to coordinate airspace usage of military aircraft and review the safety of flight operations and routes around airports, and
- the FAA to enter into memoranda of understanding with military agencies for safety information sharing.
Text of the bill
Where this section came from
-
Jul 29, 2025 · Introduced in Senate Referred to Senate Committee on Commerce, Science, and Transportation, Jul 29, 2025
-
Dec 17, 2025 · Engrossed in Senate S.Amdt. 4070: In the nature of a substitute. Official page ›
(a)
Rulemaking
ADS–B Out reforms
. (1) In general.
Not
(A)
later
Sensitive
than
government
1
mission.
year
Beginning
after
on
the date of enactment of this section,
the
in
Administrator
applying section 91.225(f)(1)
of
the
title 14, Code of
Federal
Aviation
Regulations,
Administration
the
(in
term
this
sensitive
Act
government
referred
mission
to
shall
as
be
the
narrowly
Administrator)
construed and
shall
issue
not
or
include
revise
routine
regulations
flights,
to
non-classified
clarify
flights,
that
proficiency flights
,
with
or
respect
flights
to
of Federal officials below
the
exception
rank
described
of
in
Cabinet Member or the Chairman of the Joint Chiefs of Staff. (B) Notification. For the purposes of interpreting
section 91.225(f)(1) of title 14, Code of Federal Regulations, the
term
operating agency shall— (i) when operating a
sensitive government mission
shall
during which the aircraft will
not
include
be
any
transmitting
proficiency
ADS–B
evaluation
Out,
or
notify
training
Air
mission
Traffic
operated
Control;
within
and (ii) notify
the
lateral
Committee
boundaries
on Commerce, Science, and Transportation and the Committee on the Armed Services
of the
surface
Senate
area
and the Committee on Transportation and Infrastructure and the Committee on the Armed Services
of
Class
the
B
House
or
of Representatives on a monthly basis regarding each sensitive government mission within
Class
C
B
airspace
, unless
operated during
such
operation
month.
is
(2)
for
Rulemaking
a
and
national
administrative
security event
action
. (
2
A
)
Report
In general
.
If
Not later than 1 year after
the
date of enactment of this section, the
Administrator
fails
shall—
to
(i)
issue or revise regulations
pursuant
to
paragraph
update section 91.225
(
1),
f)
the
of
Administrator
title
shall
14
,
within
Code
30
of
days
Federal Regulations
,
submit
to
comply with
the
Committee
requirements
on
of
Commerce,
this
Science,
section;
and
Transportation
(ii) revise any memorandum
of
agreement between
the
Senate
FAA
and
any other Federal, State, local, or Tribal agency to conform with
the
Committee
revised
on
regulations
Transportation
described
and
in
Infrastructure
clause (i), including any agreement pursuant to section 1046
of the
House
John S. McCain National Defense Authorization Act for Fiscal Year 2019 (49 U.S.C. 40101 note). (B) Report. If the Administrator fails to issue or revise regulations pursuant to subparagraph (A) or revise any memorandum
of
Representatives
agreement between the FAA and any other agency pursuant to such subparagraph, the Administrator shall, within 30 days, submit to the appropriate committees of Congress
a report on the status of such regulations, including the reasons that the Administrator has failed to issue or revise such regulations
within the period required under such subparagraph
. (b)
Guidance
GAO
on
review
use
and
of
report.
technology
Not
other
later
than
ADS–B.
the
Not
date
later
that
than
is
180
2
days
years
after the date of enactment of this section, the
Administrator
Comptroller General of the United States
shall
—
issue
(1)
guidance
review
to
the
clarify
utilization
that
of exceptions under section 91.225(f) of title 14
,
Code of Federal Regulations (or any successor regulation), as revised under subsection (a),
to
determine— (A) whether
the
Department of Defense and other relevant Federal agencies or other applicable operators have utilized such exceptions in accordance with relevant laws and regulations; and (B) the
extent
practicable,
of
all
such
aircraft
utilization;
operating
(2)
for
compare
purposes
the utilization
of
national
exceptions
defense,
specified
homeland
in
security
such
intelligence,
section
or
91.225(f)
law
before
enforcement
and
should
after
utilize
the
Traffic
issuance
Information
of
Services–Broadcast
revised regulations under subsection
(
TIS–B
a); and (3
)
submit to the Administrator
and the
Traffic
appropriate
Alert
committees of Congress a report on the findings of the review conducted under paragraph (1)
and
Collision
the
Avoidance
comparison
System
conducted under paragraph
(
TCAS
2
). (c)
FAA review of non-compliant operators. Upon submission of the report under subsection (b)(3), the Administrator shall— (1) determine whether any Federal agency or other applicable operator that has been found to have not utilized the exceptions under section 91.225(f) of title 14, Code of Federal Regulations (or any successor regulation), as revised under subsection (a), in accordance with relevant laws and regulations shall be permitted to continue to utilize such exceptions; and (2) not later than 30 days after the date on which the Comptroller General submits the report under subsection (b)(3), brief the appropriate committees of Congress on such determination. (d)
Reports. (1) To the Administrator. Not later than 90 days after the date of enactment of this section,
each
and
agency
on
required
a
to
quarterly
operate
basis
Automatic
thereafter,
Dependent
each
Surveillance–Broadcast
Federal,
Out
State,
(in
local,
this
and
Act
Tribal
referred
agency
to
that
as
performs
ADS–B
sensitive
Out)
government
in
missions
transmit
as
mode
described
in
accordance with
section 91.225
(f)(1)
of
such
title 14
,
shall
Code
submit
of
to
Federal
the
Regulations
Administrator,
(or
on
any
a
successor
quarterly
regulation),
basis
as
until
revised
the
under
date
subsection
described
(a),
in
shall
paragraph
submit
(3),
to the Administrator
a report that includes— (A) an attestation that such operations are regularly transmitting ADS–B Out and are conducted with proper consideration to aviation safety;
and
(B) a
summary
list
of operations
delineated by flight
in which the ADS–B Out equipment is not in transmit mode
because the aircraft was performing a sensitive government mission
, including the
airport, airspace location,
date, time, duration, and mission type of
each
such
operations
operation; and (C) with respect to any classified operation, a classified annex
.
(2) To Congress.
(A) In general. Not later than 180 days after the date of enactment of this section, and biannually thereafter
,
until
the
date described in paragraph (3), the
Administrator shall submit to the
Committee
appropriate
on
committees
Commerce, Science, and Transportation
of
the
Congress
Senate and the Committee on Transportation and Infrastructure of the House of Representatives
a report on the frequency and nature of the ADS–B Out exceptions granted to Federal, State, local, and
tribal
Tribal
agencies under section 91.225(f)(1) of title 14, Code of Federal Regulations
.
(or any successor regulation), as revised under subsection (a).
Such report
— (i)
shall include— (
i
I
) aggregated data on the operations in which ADS–B Out equipment is not in transmit mode by each agency described in paragraph (1); and (
ii
II
) a determination from the Administrator
as to
whether
such
each
operations
operation
jeopardize
described in paragraph (1)(B) jeopardizes
aviation safety
; and (ii) may include a classified annex
. (B) Special notification. If
the Administrator determines that
an agency described in paragraph (1)
is
operates
too
a
frequently,
flight
at the discretion of the Administrator,
using
exceptions
an exception
granted under section 91.225(f)(1) of
such
title 14,
the
Code
Administrator
of
shall
Federal
notify
Regulations
the
(or
Committee
any
on
successor
Commerce,
regulation),
Science
as revised under subsection (a), 5 or more times in a calendar month
,
and
or
Transportation
fails
of
to
the
provide
Senate
to
and
the Administrator
the
Committee
attestation
on
required
Transportation
under
and
paragraph
Infrastructure
(1)(A),
of
the Administrator shall notify
the
House
appropriate committees
of
Representatives
Congress
of such
determination
use
within 14 days of
being notified of
such
determination
use
.
(3)
For
Sunset
the purposes of this subparagraph, a flight shall be interpreted as the period beginning when an aircraft moves under its own power for the purpose of flight and ending when the aircraft lands
.
The
(e)
reporting
Annual
requirements
Inspector
described
General
in
audits.
this
(1)
subsection
In
shall
general.
terminate
Beginning
on the date that is
10
3
years after the date of enactment of this section
, the Inspector General of the Department of Transportation (in this section referred to as the Inspector General) shall conduct an annual audit of FAA oversight of all operations that utilize an exception under section 91
.
225(f) of title 14, Code of Federal Regulations (or any successor regulation), as revised under subsection (a), including Federal agency operations. (2) Considerations. In conducting an audit under paragraph (1), the Inspector General shall assess the efficacy of FAA oversight related to the following: (A) Ensuring exceptions under such section 91.225(f)(1) (or any successor regulation) are strictly utilized by operators in accordance with relevant laws and regulations. (B) Ensuring exceptions under such section 91.225(f)(1) (or any successor regulation) are not routinely used by operators. (C) Identifying and engaging with any operator not in compliance with relevant laws and regulations relating to exceptions under such section 91.225(f)(1) (or any successor regulation). (D) Any other factor determined appropriate by the Inspector General. (3) Briefings to Congress. The Inspector General shall brief the appropriate committees of Congress on an annual basis after the completion of each annual audit.
(a) ADS–B Out reforms
(1) In general
(A) Sensitive government mission. Beginning on the date of enactment of this section, in applying section 91.225(f)(1) of title 14, Code of Federal Regulations, the term sensitive government mission shall be narrowly construed and shall not include routine flights, non-classified flights, proficiency flights, or flights of Federal officials below the rank of Cabinet Member or the Chairman of the Joint Chiefs of Staff.
(B) Notification. For the purposes of interpreting section 91.225(f)(1) of title 14, Code of Federal Regulations, the operating agency shall—
(i) when operating a sensitive government mission during which the aircraft will not be transmitting ADS–B Out, notify Air Traffic Control; and
(ii) notify the Committee on Commerce, Science, and Transportation and the Committee on the Armed Services of the Senate and the Committee on Transportation and Infrastructure and the Committee on the Armed Services of the House of Representatives on a monthly basis regarding each sensitive government mission within Class B airspace operated during such month.
(2) Rulemaking and administrative action
(A) In general. Not later than 1 year after the date of enactment of this section, the Administrator shall—
(i) issue or revise regulations to update section 91.225(f) of title 14, Code of Federal Regulations, to comply with the requirements of this section; and
(ii) revise any memorandum of agreement between the FAA and any other Federal, State, local, or Tribal agency to conform with the revised regulations described in clause (i), including any agreement pursuant to section 1046 of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 (49 U.S.C. 40101 note).
(B) Report. If the Administrator fails to issue or revise regulations pursuant to subparagraph (A) or revise any memorandum of agreement between the FAA and any other agency pursuant to such subparagraph, the Administrator shall, within 30 days, submit to the appropriate committees of Congress a report on the status of such regulations, including the reasons that the Administrator has failed to issue or revise such regulations within the period required under such subparagraph.
(b) GAO review and report. Not later than the date that is 2 years after the date of enactment of this section, the Comptroller General of the United States shall—
(1) review the utilization of exceptions under section 91.225(f) of title 14, Code of Federal Regulations (or any successor regulation), as revised under subsection (a), to determine—
(A) whether the Department of Defense and other relevant Federal agencies or other applicable operators have utilized such exceptions in accordance with relevant laws and regulations; and
(B) the extent of such utilization;
(2) compare the utilization of exceptions specified in such section 91.225(f) before and after the issuance of revised regulations under subsection (a); and
(3) submit to the Administrator and the appropriate committees of Congress a report on the findings of the review conducted under paragraph (1) and the comparison conducted under paragraph (2).
(c) FAA review of non-compliant operators. Upon submission of the report under subsection (b)(3), the Administrator shall—
(1) determine whether any Federal agency or other applicable operator that has been found to have not utilized the exceptions under section 91.225(f) of title 14, Code of Federal Regulations (or any successor regulation), as revised under subsection (a), in accordance with relevant laws and regulations shall be permitted to continue to utilize such exceptions; and
(2) not later than 30 days after the date on which the Comptroller General submits the report under subsection (b)(3), brief the appropriate committees of Congress on such determination.
(d) Reports
(1) To the Administrator. Not later than 90 days after the date of enactment of this section, and on a quarterly basis thereafter, each Federal, State, local, and Tribal agency that performs sensitive government missions as described in section 91.225(f)(1) of title 14, Code of Federal Regulations (or any successor regulation), as revised under subsection (a), shall submit to the Administrator a report that includes—
(A) an attestation that such operations are regularly transmitting ADS–B Out and are conducted with proper consideration to aviation safety;
(B) a list of operations delineated by flight in which the ADS–B Out equipment is not in transmit mode because the aircraft was performing a sensitive government mission, including the airport, airspace location, date, time, duration, and mission type of each such operation; and
(C) with respect to any classified operation, a classified annex.
(2) To Congress
(A) In general. Not later than 180 days after the date of enactment of this section, and biannually thereafter, the Administrator shall submit to the appropriate committees of Congress a report on the frequency and nature of the ADS–B Out exceptions granted to Federal, State, local, and Tribal agencies under section 91.225(f)(1) of title 14, Code of Federal Regulations (or any successor regulation), as revised under subsection (a). Such report—
(i) shall include—
(I) aggregated data on the operations in which ADS–B Out equipment is not in transmit mode by each agency described in paragraph (1); and
(II) a determination from the Administrator as to whether each operation described in paragraph (1)(B) jeopardizes aviation safety; and
(ii) may include a classified annex.
(B) Special notification. If an agency described in paragraph (1) operates a flight using an exception granted under section 91.225(f)(1) of title 14, Code of Federal Regulations (or any successor regulation), as revised under subsection (a), 5 or more times in a calendar month, or fails to provide to the Administrator the attestation required under paragraph (1)(A), the Administrator shall notify the appropriate committees of Congress of such use within 14 days of being notified of such use. For the purposes of this subparagraph, a flight shall be interpreted as the period beginning when an aircraft moves under its own power for the purpose of flight and ending when the aircraft lands.
(e) Annual Inspector General audits
(1) In general. Beginning on the date that is 3 years after the date of enactment of this section, the Inspector General of the Department of Transportation (in this section referred to as the Inspector General) shall conduct an annual audit of FAA oversight of all operations that utilize an exception under section 91.225(f) of title 14, Code of Federal Regulations (or any successor regulation), as revised under subsection (a), including Federal agency operations.
(2) Considerations. In conducting an audit under paragraph (1), the Inspector General shall assess the efficacy of FAA oversight related to the following:
(A) Ensuring exceptions under such section 91.225(f)(1) (or any successor regulation) are strictly utilized by operators in accordance with relevant laws and regulations.
(B) Ensuring exceptions under such section 91.225(f)(1) (or any successor regulation) are not routinely used by operators.
(C) Identifying and engaging with any operator not in compliance with relevant laws and regulations relating to exceptions under such section 91.225(f)(1) (or any successor regulation).
(D) Any other factor determined appropriate by the Inspector General.
(3) Briefings to Congress. The Inspector General shall brief the appropriate committees of Congress on an annual basis after the completion of each annual audit.