It shall be an offense for any person to take or remove any paper, document, or personal property owned by the city unless the permission of the legal custodian thereof is first obtained, and no person shall keep or retain any such paper, document, or other personal property after demand for the return thereof has been made by the legal custodian. (Ord. 1775 §§ 1, 2, 1991; Ord. 1547 § 7, 1977)