Oregon Revised Statutes Highways, Roads, Bridges and Ferries § 366.159

(1) The Department of Transportation may issue a vegetation control permit to a person who holds a sign permit issued pursuant to ORS 377.700 to 377.844. A vegetation control permit authorizes the holder of the permit to control vegetation in the right of way of a state highway, in accordance with the provisions of this section, in order to keep the sign visible to the traveling public.

(2) The department may not issue a vegetation control permit for a scenic area as defined in ORS 377.505.

(3) The department may not issue a vegetation control permit for the right of way of a portion of state highway that is access controlled, or for which access rights have not accrued to the abutting property unless:

(4) The department may charge a fee to the person issued a vegetation control permit under this section. The amount of the fee shall be determined by the department and shall be designed to recover the cost to the department of issuing the permit.