No person shall:

A.  discard or deposit or leave any  rubbish, trash, debris, offensive substance or other solid or liquid waste in or upon a  Portland Streetcar vehicle, or Portland Streetcar station, except in receptacles provided for that purpose; or

B.  spit, defecate or urinate in or upon a Portland Streetcar vehicle or Portland Streetcar station except in the confines of a lavatory where lavatories are available for public use.