On-Road Vehicle and Engine Emission Regulations

16 (1) Subject to sections 19 and 19.1, Otto-cycle heavy-duty engines of a specific model year shall conform to the exhaust emission and crankcase emission standards applicable to Otto-cycle heavy-duty engines of the model year in question set out in section 10 of Title 40, chapter I, subchapter C, part 86, subpart A, of the CFR.

(2) Subject to sections 19 and 19.1, diesel heavy-duty engines of a specific model year shall conform to the exhaust emission and crankcase emission standards applicable to diesel heavy-duty engines of the model year in question set out in section 11 of Title 40, chapter I, subchapter C, part 86, subpart A, of the CFR.

(3) Subject to sections 19 and 19.1, heavy-duty engines of a specific model year used or intended for use in heavy-duty vehicles that have a GVWR of 6 350 kg (14,000 lb) or less shall be equipped with an on-board diagnostic system that conforms to the standards applicable to engines of the model year in question set out in section 17 of Title 40, chapter I, subchapter C, part 86, subpart A, of the CFR.

(4) Subject to sections 19 and 19.1, heavy-duty engines of the 2014 and later model years used or intended for use in heavy-duty vehicles that have a GVWR of more than 6 350 kg (14,000 lb) shall be equipped with an on-board diagnostic system that conforms to the standards applicable to engines of the model year in question set out in section 18 of Title 40, chapter I, subchapter C, part 86, subpart A, of the CFR.