(1) Notwithstanding any other provision of law, a person may operate a Class I, Class II or Class IV all-terrain vehicle that is not otherwise properly equipped for operation on a highway on the highways of this state if:
(a) The person is using the all-terrain vehicle for transportation between ranching or farming headquarters, agricultural fields or pastures;
(b) The person holds a valid driver license;
(c) The person complies with posted speed limits, but in no event exceeds a speed of 20 miles per hour;
(d) The person operates the all-terrain vehicle as closely as is practicable to the right-hand edge of the highway, including shoulders, if any;
(e) The all-terrain vehicle is equipped with a lighted headlight and taillight; and
(f) The all-terrain vehicle displays a slow-moving vehicle emblem described under ORS 815.060.
(2) A person commits the offense of unlawful operation of a Class I, Class II or Class IV all-terrain vehicle used for agricultural purposes if the person operates a Class I, Class II or Class IV all-terrain vehicle on a highway in violation of subsection (1) of this section.
(3) The offense described in subsection (2) of this section, unlawful operation of a Class I, Class II or Class IV all-terrain vehicle used for agricultural purposes, is a Class D traffic violation.