Immigration Act Article 22
An alien who possesses a valid passport with a valid visa, a valid passport without a visa, or a valid travel document, is permitted to enter the State to have a visit or reside in the State after having been inspected by the National Immigration Agency.An alien who acquires permission to reside in the State pursuant to the preceding Paragraph shall apply to the National Immigration Agency for an Alien Resident Certificate within thirty (30) days, from the next day of the arrival date in the State, save any person who applies for and obtains a valid 4-in-1 certificate consisting of a work permit, a resident visa, an Alien Resident Certificate and a reentry permit or any other certificate with an equivalent function of an Alien Resident Certificate.The validity period of an Alien Resident Certificate shall not be longer than three (3) years starting from the next day of the date of the alien’s acquisition of the permission to reside.
中文原文 入出國及移民法第22條
外國人持有效簽證或適用以免簽證方式入國之有效護照或旅行證件，經移民署查驗許可入國後，取得停留、居留許可。
依前項規定取得居留許可者，應於入國後之翌日起算三十日內，向移民署申請外僑居留證。
但申請取得工作許可、居留簽證、外僑居留證及重入國許可四證合一之有效證件，或其他已含有外僑居留證功能之證件者，得免申請外僑居留證。
外僑居留證之有效期間，自許可之翌日起算，最長不得逾三年。
依前項規定取得居留許可者，應於入國後之翌日起算三十日內，向移民署申請外僑居留證。
但申請取得工作許可、居留簽證、外僑居留證及重入國許可四證合一之有效證件，或其他已含有外僑居留證功能之證件者，得免申請外僑居留證。
外僑居留證之有效期間，自許可之翌日起算，最長不得逾三年。