Enforcement Rules of the National Health Insurance Act Article 65
A non-beneficiary of the Insurance who had household registration in Taiwan or held resident certificate before the enforcement of the amendments of the Act on January 4, 2011 shall subscribe to the Insurance and become a beneficiary within four months after he or she continues to have had household registration or stayed in Taiwan for four full months.
中文原文 全民健康保險法施行細則第65條
本法中華民國一百年一月四日修正之條文施行時，已在臺灣地區設有戶籍或領有居留證明文件之非本保險保險對象，自繼續在臺灣地區設籍或居留滿四個月時起，應參加本保險為保險對象。