No board, agency, officer or employee of the City shall issue, grant or approve any permit, license, certificate or other authorization, including special permits by the Planning Board or variances by the Board of Appeals, for any construction, reconstruction, alteration, enlargement or moving of any building or for any use of any land or buildings that would not be in full compliance with the provisions of this chapter. Any such permit, license, certificate or other authorization issued, granted or approved in violation of the provisions of this chapter shall be null and void and of no effect, without the necessity of any proceedings of revocation or nullification thereof, and any work undertaken or use established pursuant to any such permit, license, certificate or authorization shall be unlawful, and no action shall be taken by any board, agency, officer or employee of the City purporting to validate such violation.