Act Governing Relations with Hong Kong and Macau Article 58
Permits granted before this Act is implemented to Hong Kong or Macau Residents for entry to the Taiwan Area or for other matters legally requiring permission shall not be revoked or changed after this Act is implemented, unless there are changes in the rules and regulations or the facts by which said permits were granted, or there is some other legal basis by which it should be revoked.
中文原文 香港澳門關係條例第58條
香港或澳門居民，就入境及其他依法律規定應經許可事項，於本條例施行前已取得許可者，本條例施行後，除該許可所依據之法規或事實發生變更或其他依法應撤銷者外，許可機關不得撤銷其許可或變更許可內容。