Automobile trailers shall not be used as a permanent place of abode or as a permanent dwelling or for indefinite periods of time; provided, that any such trailer properly connected with the public water supply and the city sanitary sewer systems, and constructed and located in compliance with all the requirements of the building, plumbing, sanitary, health and zoning ordinances and codes of the city, and not inhabited by a greater number of occupants than that for which it was designed, may be permitted on any premises under permit properly secured as provided for in the building, plumbing, sanitary, health and zoning ordinances and codes. (Prior code § 19-3).