Oregon Revised Statutes Oregon Vehicle Code § 816.020

With respect to motor carriers operated under the jurisdiction of the Department of Transportation, the department may adopt standard specifications at variance with the requirements and standards for vehicle lighting equipment under ORS 811.515 to 811.525 or 816.040 to 816.370 whenever standard specifications adopted by the Federal Motor Carrier Safety Administration are different from those established by those sections. The standard specifications so adopted by the department shall conform to standard specifications adopted by the Federal Motor Carrier Safety Administration for vehicles operating in interstate commerce.