Diesel motorhome sales are set to be halted in several states at the start of next year due to a new climate rule from California being enacted, according to RVtravel.

Motorhome sales are being prevented in California, Washington, Oregon, New York, Massachusetts and New Jersey if the vehicles do not meet certain emission requirements based on regulations from the California Air Resources Board (CARB), according to RVtravel. CARB amended its Advanced Clean Truck regulations on Oct. 24, which require all vehicles over 8,500 pounds to produce zero emissions.

Motorhome owners in the six states will not be allowed to register a recreational vehicle (RV) that is not in compliance with the climate regulation, according to RVtravel.