(a) Obstructing.--A person, who, having no legal privilege to do so, intentionally or recklessly obstructs any highway, railroad track or public utility right-of-way, sidewalk, navigable waters, other public passage, whether alone or with others, commits a summary offense, or, in case he persists after warning by a law officer, a misdemeanor of the third degree. No person shall be deemed guilty of an offense under this subsection solely because of a gathering of persons to hear him speak or otherwise communicate, or solely because of being a member of such a gathering.
(b) Refusal to move on.--
(1) A person in a gathering commits a summary offense if he refuses to obey a reasonable official request or order to move:
(i) to prevent obstruction of a highway or other public passage; or
(ii) to maintain public safety by dispersing those gathered in dangerous proximity to a fire or other hazard.
(2) An order to move, addressed to a person whose speech or other lawful behavior attracts an obstructing audience, shall not be deemed reasonable if the obstruction can be readily remedied by police control of the size or location of the gathering.
(c) Definition.--As used in this section the word "obstructs" means renders impassable without unreasonable inconvenience or hazard.