relative to inspection and registration of certain fleet vehicles and necessary amendments and administrative rules regarding the state implementation plan.

SB 157 modifies New Hampshire's vehicle inspection requirements for rental fleet vehicles registered under RSA 261:40-b. It requires these vehicles to undergo inspection only at the time of purchase (not annually), with a sticker indicating compliance valid until the common annual expiration date in the second year after purchase. The bill also mandates the Department of Environmental Services to submit an amendment to the state implementation plan (SIP) to the EPA for approval, which must be certified before certain provisions take effect. This change directly affects rental car companies and fleet operators enrolled in the designated registration program, streamlining inspections for their vehicles while ensuring environmental regulatory alignment.