Political Parties Act Article 18

Political parties shall not establish a party organization in any government agency, government institution, public business institution, administrative body, court, military service, or school; this shall not apply to party caucuses established in representative bodies at any level.
中文原文 政黨法第18條
政黨不得在政府機關、機構、公營事業機構、行政法人、法院、軍隊或學校設置黨團組織。
但在各級民意機關設置者,不在此限。

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