It shall be unlawful for any person to willfully abandon any flat-bottomed boat, barge, scow or raft to or upon any public land or waterway or to or upon any private property without the consent of the official designated by ordinance to perform such functions in the municipality having jurisdiction over such public land or waterway, or the owner or other person in charge of the private property. A flat-bottomed boat, barge, scow or raft which has remained moored, grounded or otherwise attached or fastened to or upon any public land or waterway or any private property without such consent for a period of more than 20 days shall be prima facie evidence of such abandonment.
Any person who violates this section shall be guilty of a misdemeanor.