The ordinance poses three substantive requirements for the issuance of a license or permit; the applicant:11 (1) must be at least eighteen years of age; (2) must not have been convicted of or pleaded nolo contendre to a felony or any crime involving moral turpitude, prostitution, obscenity, or other crime of a sexual nature within the past five years; and (3) must not have been found to have vio