It is unlawful for any person, not an officer or employee of the City, to remove, destroy, tear down or deface, either in whole or in part, or to mark or write upon, change, obliterate or mar, or in any manner alter or change the writing, printing, or signature, or any part of the writing, printing or signature, upon any bulletin, legal notice or advertisement, poster or paper writing of the City lawfully posted or placed in the City. [Code 1970 § 9.64.030; Code 1954 § 10-5.64.]