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 and crankcase emission standards applicable to Otto-cycle heavy-duty engines of that model year set out in section 10, 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 and crankcase emission standards applicable to diesel heavy-duty engines of that model year set out in section 11, 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 pounds) or less shall be equipped with an on-board diagnostic system that conforms to the standards applicable to engines of that model year set out in section 17, subpart A, of the CFR.

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