Document Legalization Act for the Ministry of Foreign Affairs and Overseas Missions Article 15-1

Documents issued in the territory of a nation having signed with the ROC a written agreement on abolishing relegalization requirements, after being legalized by the competent authority designated by said nation’s government, shall have the same legal effect as if legalized by the relevant ROC overseas mission.
中文原文 外交部及駐外館處文件證明條例第15-1條
與我國簽署免除重複驗證國際書面協定者,於該國境內作成之文件,經其政府指定之權責機關驗證後,與經我國駐外館處文書驗證具有相同之效力。

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