It shall be unlawful for any person to dump or otherwise dispose of trash, garbage, refuse or other unsightly matter on a public street, right-of-way or on private property without the written consent of the owner thereof or his agent. When a violation of the provisions of this section has been observed by any person, and the matter dumped or disposed of on the street, right-of-way or private property has been ejected from a motor vehicle, the owner or operator of such motor vehicle shall be presumed to be the person ejecting such trash, garbage, refuse or other unsightly matter, provided that such presumption shall be rebuttable by competent evidence.  Any person convicted of a violation of this section shall be guilty of a Class 3 misdemeanor and punished in accordance with the provisions of Section 1-15, General Penalty, and Section 85-11 of this Code.