Or. Rev. Stat. § 815.135
This section establishes exemptions from ORS 815.130. This section establishes exemptions from ORS 815.130. The exemptions under this section are in addition to any exemptions under ORS 801.026. The exemptions under this section are partial or complete as described in the following:
(1) The following vehicles shall be deemed in compliance with the brake requirements if the vehicles are equipped with original manufacturer’s equipment and accessories, or their equivalent, and maintained in safe operating condition:
(3) The following vehicles are exempt from the brake requirements:
[1983 c.338 §473; 1985 c.69 §2; 1997 c.402 §9; 2003 c.341 §15; 2015 c.138 §31; 2017 c.78 §1]