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.