All departments, officials or public employees vested with the duty or authority to issue permits, licenses or certificates of occupancy, where required by law, shall conform to the provisions of this title. No such permit, license or certificate for buildings, uses or purposes where the same would be in conflict with the provisions of this title shall be issued. Any such permit, license or certificate, if issued in conflict with the provisions thereof, shall be null and void.
(`78 Code, § 17.108.030.)