Enforcement Rules of the Act Governing Relations with Hong Kong and Macau Article 12

The Document Legalization Act for the Ministry of Foreign Affairs and Overseas Missions shall apply mutatis mutandis to the handling of certification by institutions or non-governmental organizations prescribed in Article 9 of the Act.
中文原文 香港澳門關係條例施行細則第12條
本條例第九條之機構或民間團體辦理驗證,準用外交部及駐外館處文件證明條例之規定。

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