[Congressional Bills 119th Congress]
[From the U.S. Government Publishing Office]
[H.R. 6688 Introduced in House (IH)]
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119th CONGRESS
1st Session
H. R. 6688
To require the National Highway Traffic Safety Administration to
establish guidelines for advanced driver assistance systems
calibration, modifications, and tolerances, and for other purposes.
_______________________________________________________________________
IN THE HOUSE OF REPRESENTATIVES
December 12, 2025
Mrs. Harshbarger (for herself, Mr. Obernolte, Mr. Vasquez, and Mrs.
Torres of California) introduced the following bill; which was referred
to the Committee on Energy and Commerce
_______________________________________________________________________
A BILL
To require the National Highway Traffic Safety Administration to
establish guidelines for advanced driver assistance systems
calibration, modifications, and tolerances, and for other purposes.
Be it enacted by the Senate and House of Representatives of the
United States of America in Congress assembled,
SECTION 1. SHORT TITLE.
This Act may be cited as the ``ADAS Functionality and Integrity
Act''.
SEC. 2. ADAS MODIFICATION RANGES AND TOLERANCES GUIDELINES.
(a) Guidelines for ADAS.--Not later than 24 months after the date
of the enactment of this Act, the Secretary of Transportation, acting
through the Administrator of the National Highway Traffic Safety
Administration, in consultation with manufacturers of passenger motor
vehicles and equipment, standard settings organizations, the
independent automotive aftermarket, and dealers, shall develop and
publish guidelines to ensure ADAS and vehicle dynamic systems installed
in any passenger motor vehicle, for a model year on and after 2028
maintains functionality when a passenger motor vehicle is modified or
customized that include the following:
(1) Allowable modification ranges and tolerances, including
physical parameters impacting ADAS and vehicle dynamic systems
functionality, including ride height, wheel and tire
dimensions, overall static geometry, physical displacement
parameters, and sensor and camera function.
(2) A process for manufacturers to provide vehicle
tolerance and system sensitivity information relevant to
modification and calibration to owners and the Administrator
within 30 days after the release of a passenger motor vehicle.
(3) Quantifiable tolerance thresholds for changes in
vertical and lateral displacement, in all axes, necessary to
maintain proper ADAS functionality.
(4) Proper calibration procedures of ADAS and other vehicle
dynamic systems following repair, modification, or component
replacement.
(5) Confirmatory test protocols and performance validation
metrics that allow owners, service providers, and independent
repair facilities to verify the operational integrity of ADAS
after calibration.
(b) Contracting Authority.--The Administrator may contract with
independent laboratories and vehicle testing facilities to carry out
any testing that may be required to develop the guidelines under
subsection (a).
(c) Requirement To Use Empirical Data.--Any determination made by
the Administrator in issuing the guidelines required pursuant to
subsection (a) shall be based on empirical data derived from dynamic
testing, independent research, and public data sources.
(d) Use of NCAP Methodologies.--The guidelines described in
subsection (a)(4) shall reference or expand upon methodologies
established by the United States New Car Assessment Program,
including--
(1) a standardized scoring scale to evaluate the
effectiveness of calibration (such as good, fair, and poor);
and
(2) transparent validation criteria that can be applied
across vehicle platforms and assessed over the lifecycle of the
vehicle.
(e) Enforcement.--A manufacturer of a passenger motor vehicle or
equipment that does not meet the guidelines issued pursuant to this
section is subject to the civil penalties described under section
30165(a) of title 49, United States Code.
SEC. 3. ADAS MODIFICATION RANGES AND TOLERANCES STUDY.
(a) Study Required.--Not later than 12 months after the date of the
enactment of this Act, the Secretary of Transportation, acting through
the Administrator of the National Highway Traffic Safety
Administration, shall complete a study and submit to Congress a report
that assesses the safety needs, feasibility, capability, and cost to
the National Highway Traffic Safety Administration to develop and
maintain industry guidelines to support the functionality of ADAS and
vehicle dynamic systems installed in passenger motor vehicles for a
model year on and after 2028 after a passenger motor vehicle is
modified or customized. The study shall consider the development of
industry guidelines relating to the following:
(1) Vehicle tolerance and system sensitivity information
relevant to calibration following modification.
(2) Allowable modification ranges and tolerances for
passenger motor vehicles, including physical parameters that
impact ADAS and vehicle dynamic systems functionality,
including ride height, wheel and tire dimensions, overall
static geometry, physical displacement parameters, and sensor
and camera function.
(3) Quantifiable tolerance thresholds for changes in
vertical, longitudinal, and lateral displacement, in all axes,
necessary to maintain proper ADAS functionality.
(4) Proper calibration procedures of ADAS and other vehicle
dynamic systems following repair, modification, or component
replacement.
(5) Confirmatory test protocols and performance validation
metrics that allow owners, service providers, and independent
repair facilities to verify the operational integrity of ADAS
after calibration.
(b) Stakeholder Outreach.--In carrying out the study required under
subsection (a), the Administrator shall consult with manufacturers of
passenger motor vehicles and equipment, standard setting organizations,
the independent automotive aftermarket, and dealers.
SEC. 4. DEFINITIONS.
In this Act:
(1) Administrator.--The term ``Administrator'' means the
Administrator of the National Highway Traffic Safety
Administration.
(2) Advanced driver assistance systems; adas.--The term
``advanced driver assistance system'' or ``ADAS'' means a
passenger motor vehicle equipped with a Level 0, Level 1 or
Level 2 system.
(3) Dealer; manufacturer.--The terms ``dealer'' and
``manufacturer'' have the meaning given those terms in section
30102 of title 49, United States Code.
(4) Confirmatory test.--The term ``confirmatory test''
means a standardized post-calibration vehicle test designed to
validate system performance.
(5) Independent automotive aftermarket.--The term
``independent automotive aftermarket'' means any party or
entity not authorized by a passenger motor vehicle manufacturer
or affiliated service provider.
(6) Level 0; level 1; level 2.--The terms ``Level 0'',
``Level 1'', and ``Level 2'' have the meaning given those terms
in the April 2021 edition of the J3016 recommended practice of
SAE International, ``Taxonomy and Definitions for Terms Related
to Driving Automation Systems for On-Road Motor Vehicles'', or
any subsequent edition of J3016 adopted by the Secretary.
(7) Motor vehicle.--The term ``motor vehicle'' has the
meaning given that term in section 32101 of title 49, United
States Code.
(8) Owner.--The term ``owner'' has the meaning given that
term in section 30106(d)(2) of title 49, United States Code.
(9) Passenger motor vehicle.--The term ``passenger motor
vehicle'' has the meaning given that term in section 32101 of
title 49, United States Code, including a motor vehicle with a
gross vehicle weight rating of less than 10,000 pounds.
(10) Secretary.--The term ``Secretary'' means the Secretary
of Transportation.
(11) Vehicle dynamic system.--The term ``vehicle dynamic
system'' means ADAS and any related or integrated systems
affecting the stability, control, or motion of the vehicle.
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