Assembly and Parade Act Article 21

Participants in an assembly or parade shall follow instructions given by the responsible person or the stewards in maintaining order.Any persons interfering with the assembly or parade shall be excluded by the responsible person or stewards and shall leave the scene immediately.
中文原文 集會遊行法第21條
集會、遊行之參加人,應服從負責人或糾察員關於維持秩序之指揮。
對於妨害集會遊行之人,負責人或糾察員得予以排除。
受排除之人,應立即離開現場。

English translation for reference only; the Chinese text prevails. Not legal advice.