2015 ORS § 826.013¹
(1) Vehicles registered under ORS 826.009 (Proportional registration of commercial vehicles), 826.011 (Proportional fleet registration) or 826.031 (Registration for certain vehicles subject to weight mile tax and not otherwise registered) are required to establish a registration weight.
(2) Registration weight is established for the following purposes:
(a) The registration weight is the weight used in the declaration of weight under ORS 826.015 (Declaration of weight) to determine the registration fees under ORS 826.017 (Registration fees for proportionally registered vehicles) and ORS 803.420 (Registration fees) for vehicles required to establish registration weight under this section.
(b) A vehicle that is required to establish registration weight by this section is in violation of ORS 803.315 (Failure to pay registration fee) if the vehicle is operated on a highway of this state at a weight in excess of the registration weight except when carrying a load:
(A) Under the provisions of ORS 376.305 (Policy and purpose of Act) to 376.390 (Payment of taxes and fees by forest road contractor);
(B) Of over 105,500 pounds combined weight under a variance permit issued under ORS 818.200 (Authority to issue variance permits);
(C) Under a registration weight trip permit issued under ORS 803.600 (Trip permits); or
(D) Consisting of towed motor vehicles.
(3) Registration weight is established at the time of registration and whenever the vehicle has been altered or reconstructed by furnishing a declaration of weight described under ORS 826.015 (Declaration of weight) that contains a statement of the maximum combined gross weight at which the vehicle will be operated on the highways of this state except when carrying loads described under subsection (2)(b) of this section. The maximum registration weight for any vehicle required to establish a registration weight under this section is 105,500 pounds. Vehicles operating at weights above 105,500 pounds will operate under a variance permit issued under ORS 818.200 (Authority to issue variance permits).
(4) The weight of a camper, a trailing manufactured structure or the following trailing vehicles should not be included in the registration weight:
(a) Trailers with a loaded weight of 8,000 pounds or less.
(b) Special use trailers, travel trailers and fixed load vehicles.
(c) Towed motor vehicles. [Formerly 768.011 [bad link]; 2003 c.655 §142]