Or. Admin. R. 340-261-0040 – Requirement to Meet California Vehicle Emission Standards

(1) Starting with the 2027 engine model year and for each engine model year thereafter no person may deliver for sale, or sell, in Oregon any new on-highway medium- or heavy-duty engine unless such engine is certified to the California emission standards as required under OAR 340-261-0050, except as provided in OAR 340-261-0060, Exemptions.
(2) Starting with the 2028 model year and for each model year thereafter no person may deliver for sale, or sell, in Oregon any new medium- or heavy-duty truck unless such vehicle is certified to the California emission standards as required under OAR 340-261-0050, except as provided in OAR 340-261-0060, Exemptions.
(3) All motor medium- and heavy-duty truck manufacturers and dealers must comply with the sales and reporting requirements contained in this division.

ORS 468.020, ORS 468A.025 & 468A.360

ORS 468A.025, 468A.360, ORS 468A.010, 468A.015, 468A.050 & 468A.279