Notwithstanding the provisions of this Chapter or any other ordinance of the City controlling or regulating swine, cows, goats, sheep, horses or other animals customarily shown at fairs, the 7th District Agricultural Association, and persons exhibiting at the 7th District Agricultural Annual Fair, held in the City, may for a period from one week before to one week after such fair show animals on such 7th District’s fairgrounds, subject to the rules and regulations of the 7th District Agricultural Fair Board.