To insure that the amusement activity areas are kept free and clear of all rubbish, waste matter and debris and are properly cleaned up and cleared of all such material at the termination of the amusement activity, the chief of police may require every applicant for a permit to deposit with the city a cash bond in the sum of five hundred dollars. The return of the bond shall be conditioned upon the permittee completely cleaning up and clearing the amusement area, including any off-street parking area of any rubbish, waste matter and debris. Any cleanup expense advanced by the city shall be deducted from the bond. (Ord. 304 § 19, 1972).