(a) The person parks, stops or stands a vehicle on a state highway in violation of any such regulations, restrictions or prohibitions; or
(b) The person is the owner of an unattended vehicle parked on a state highway in violation of any such regulations, restrictions or prohibitions.
(2) Authority to impose restrictions, regulations and prohibitions on parking, stopping or standing of vehicles on state highways is established under ORS 810.160.
(3) It is an affirmative defense to a prosecution of the owner of a vehicle under subsection (1)(b) of this section that the use of the vehicle was not authorized by the owner, either expressly or by implication.
(4) The offense described in this section, violation of posted parking restrictions on state highways, is a Class D traffic violation. [1983 c.338 §672; 1987 c.687 §6]