It shall be unlawful for any person to take possession of or make use of for any purpose, alter, deface, destroy, move, injure, obstruct by fastening a boat or vessel thereto or otherwise tie a boat or vessel to, or in any manner whatever impair the usefulness of, any bridge, any special purpose buoy or any marine navigational aid established and maintained by the City of Chicago, Chicago Park District, or any subdivision of said governments.
(Prior code § 38-29.1)