Oregon Revised Statutes Oregon Vehicle Code § 821.291

(a) Does not possess a Class I all-terrain vehicle operator permit issued under ORS 390.570;

(b) Is not accompanied by a person who is at least 18 years of age, holds a valid all-terrain vehicle operator permit issued under ORS 390.570, 390.575 or 390.577 and is able to provide immediate assistance and direction to the child; or

(c) Is not in compliance with the rider fit guidelines established by the Parks and Recreation Department under ORS 390.585.

(a) Used exclusively in farming, agricultural or forestry operations or used by persons licensed under ORS chapter 571 exclusively for nursery or Christmas tree growing operations; and

(b) Being used on land owned or leased by the owner of the vehicle.