‘Registration weight’ means the combined weight or the loaded weight required to be declared and established as the maximum combined weight or loaded weight at which certain vehicles will be operated on the highway. Vehicles for which registration weights must be declared and established and the procedures for establishing registration weights are described under ORS § 803.430. [1983 c.338 § 77; 1985 c.16 § 21; 1989 c.723 § 5; 1991 c.284 § 7; 2007 c.50 § 1]