A business license shall not be required of individual artists for the exhibition or display of paintings, sculpture, photographs or other fine arts in public buildings, art galleries, or in any business establishment if the exhibition or display is incidental to the primary business conducted on the premises, and is primarily for cultural and educational purposes. Any artist shall be exempt from the requirements of this article if the sales of his art work within the city do not result in annual gross receipt in excess of one thousand dollars. (Ord. 77-11 § 10, 1977)