(1) Any sign erected and maintained pursuant to and in discharge of any governmental function or required by any law, ordinance or governmental regulation;

(2) Signs being manufactured, transported and/or stored within the City limits shall be exempt; provided, however, that such signs are not used, in any manner or form, for purposes of advertising at the place or places of manufacture or storage;

(3) Signs located within malls, courts, arcades, porches, patios and similar areas where such signs are not visible from any point on the boundary of the premises;

(4) Signs on licensed commercial vehicles, including trailers; provided, however, that such vehicles shall not be utilized as parked or stationary outdoor display signs within 40 feet of the right-of-way of a street;

(5) Signs on vehicles regulated by the City that provide public transportation, including, but not limited to, buses and taxicabs;

(6) Art or art forms which do not contain commercial speech;

(7) Searchlights;

(8) Signs carried by a person; and

(9) Noncommercial banner signs.