Civil Servant Association Act Article 51

The provisions of Article 9 may apply, mutatis mutandis, to personnel lawfully hired or contracted by various agencies, so as to join the civil servant association of the agency of service.
中文原文 公務人員協會法第51條
各機關依法令聘用或僱用之人員得準用第九條規定,加入服務機關之公務人員協會。

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