Outdoor advertising signs and structures, where permitted, shall be set back from the established right-of-way line of any street or highway at least as far as the required front yard depth for a principal building in the districts where located, provided that for every square foot by which such signs or billboards exceed 288 square feet, such setback shall be increased by ½ foot, but such setback need not exceed 75 feet from the established right-of-way line of each such street or highway in any case.
(Ord. 4-62. Passed 3-12-62.)