2010 Pennsylvania Code
Title 18 - CRIMES AND OFFENSES
Chapter 55 - Riot, Disorderly Conduct and Related Offenses
5502 - Failure of disorderly persons to disperse upon official order.

     § 5502.  Failure of disorderly persons to disperse upon official
                order.
        Where three or more persons are participating in a course of
     disorderly conduct which causes or may reasonably be expected to
     cause substantial harm or serious inconvenience, annoyance or
     alarm, a peace officer or other public servant engaged in
     executing or enforcing the law may order the participants and
     others in the immediate vicinity to disperse. A person who
     refuses or knowingly fails to obey such an order commits a
     misdemeanor of the second degree.