No person, firm, corporation, or other entity may operate any type of ride or riding device mounted on mobile equipment unless the device is licensed under Part 3 of this subtitle. City Code, 1966, art. 15, §55(a) 1976/83, art. 15, §74(a) Ord. 53-727 Ord. 76-067 Ord. 77-396 Ord. 90-510 Ord. 04-706