In addition to the prohibitions set forth in Chapter 14A.110, no person shall fail  to abide by specific directives authorized by a peace officer or Portland Streetcar staff and provided in the form of a fixed permanent or temporary sign posted in or upon the Portland Streetcar vehicles or station.  The Director of Transportation, or the Director’s designee, may establish and post such signage in a manner to provide sufficient notice concerning the conduct required or prohibited.  Any violation of the specific directives authorized by the Director of Transportation shall constitute a violation of this Subsection.