ORS 368.942: Posting notices, signs or pictures on structures within county road right of way prohibited.

Except as provided in ORS 368.950, no person may paste, paint, brand or in any manner whatever place or attach to any building, fence, gate, bridge, tree, rock, board, structure or anything whatever within the limits of the right of way of any county road any written, printed or painted advertisement, bill, notice, sign, picture, card or poster, except within the limits of any incorporated city through which the county road runs.