On-Road Vehicle and Engine Emission Regulations

14 Subject to sections 19 and 19.1, an Otto-cycle heavy-duty vehicle of a specific model year, other than a medium-duty passenger vehicle or a complete heavy-duty vehicle, shall

• (a) be equipped with a heavy-duty engine that meets the requirements of these Regulations; and

• (b) conform to the evaporative emission standards applicable to Otto-cycle heavy-duty vehicles of that model year set out in section 10, subpart A, of the CFR.