Or. Rev. Stat. § 825.210

      825.210 Regulation of motor vehicles. The Department of Transportation may:

      (1) Require the weighing of motor vehicles loaded and empty at reasonably frequent intervals;

      (2) Inspect and require proper equipment and markings of motor vehicles and insure the making of necessary repairs, to promote efficient and safe operation; and

      (3) Prescribe the character of appliances to be used on motor vehicles to establish correct mileage traveled by such vehicles and require the installation and proper repair and inspection of such appliances. [Formerly 767.450]