(1) All traffic control devices placed in position by the Director or at his/or her direction shall be deemed official traffic control devices for purposes of Chapter 811, Oregon Revised Statutes.

(2) All traffic control devices placed in position by the Director shall be presumed to have been placed by his/her official act or at the direction of his/her lawful authority unless the contrary is established by competent evidence.

(3) A traffic control device placed in position by the Director under provision of Oregon law and this code and purporting to conform to the lawful requirements pertaining to that device shall be presumed to comply with the requirements of the Manual on Uniform Traffic Control Devices as adopted by the Oregon Transportation Commission, unless the contrary is established by competent evidence.