H.R. 6688

[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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