Enforcement Rules for the Act Governing Relations between Peoples of the Taiwan Area and the Mainland Area Article 6
Those who, between November 2, 1987 and February 19, 2001, went to the Mainland Area and continuously resided there for over four years and consequently became People of the Mainland Area, but who previously had household registrations in the Taiwan Area and do not have household registrations in the Mainland Area or do not hold passports issued by the Mainland Area, may apply to recover their status as People of the Taiwan Area and return to reside permanently in Taiwan.The competent authorities may reject an application for reinstatement of the status as People of the Taiwan Area as set forth in the preceding Paragraph, where one of the following situations applies: 1. The applicant is or was in any position in, or a member of, agencies, organizations or institutions of the Mainland Area which relate to matters of political parties, the military, the administration or of any political nature.2. There exist facts sufficient to raise concerns of threats to national security or social stability.The procedures and review criteria regarding the application for reinstatement of the status as People of the Taiwan Area and for returning to reside permanently in Taiwan shall be prescribed separately by the competent authorities.
中文原文 臺灣地區與大陸地區人民關係條例施行細則第6條
中華民國七十六年十一月二日起迄中華民國九十年二月十九日間前往大陸地區繼續居住逾四年致轉換身分為大陸地區人民，其在臺灣地區原設有戶籍，且未在大陸地區設有戶籍或領用大陸地區護照者，得申請回復臺灣地區人民身分，並返臺定居。
前項申請回復臺灣地區人民身分有下列情形之一者，主管機關得不予許可其申請：
一、現（曾）擔任大陸地區黨務、軍事、行政或具政治性機關（構）、團體之職務或為其成員。
二、有事實足認有危害國家安全、社會安定之虞。
依第一項規定申請回復臺灣地區人民身分，並返臺定居之程序及審查基準，由主管機關另定之。
前項申請回復臺灣地區人民身分有下列情形之一者，主管機關得不予許可其申請：
一、現（曾）擔任大陸地區黨務、軍事、行政或具政治性機關（構）、團體之職務或為其成員。
二、有事實足認有危害國家安全、社會安定之虞。
依第一項規定申請回復臺灣地區人民身分，並返臺定居之程序及審查基準，由主管機關另定之。