49 CFR §585.35

At any time during the production year ending August 31, 2026, each manufacturer shall, upon request from the Office of Vehicle Safety Compliance, provide information identifying the vehicles (by make, model and vehicle identification number) that have been certified as complying with the requirements of Standard No. 208 when using the child restraint systems specified in appendix A-1 of that standard (49 CFR 571.208). The manufacturer's designation of a vehicle as a certified vehicle is irrevocable.