A mobile vendor may not park a vendor truck within 300 feet of any retail business establishment that is primarily engaged in selling the same type of food product, other merchandise, or service as that offered by the mobile vendor. City Code, 1976/83, art. 19, §§173, 174 Ord. 69-526 Ord. 70-708 Ord. 99-548 Ord. 04-672 Ord. 04-854 Ord. 14-237