Immigration Act Article 31
An alien shall apply to the National Immigration Agency for an extension before his/her visit or residence expires if he/she has to continue his/her visits or residence in the State.The validity period of the Alien Resident Certificate of the above-mentioned extension of residence in the preceding Paragraph shall be extended from the next day of the expiry date of the original residenceand shall not be longer than three (3) years.Where an alien has overstayed for less than thirty (30) days after the period of his/her residence expires and the purpose of residence remain unchanged, he/she can re-apply to the National Immigration Agency for residence after paying a fine pursuant to Paragraph 2 of Article 74-1. Where the alien applies for permanent residence, one (1) year shall be deducted from the period of residence in the Taiwan Area.The National Immigration Agency shall revoke the residence permit of an alien and terminate the Alien Resident Certificate if his/her resident reasons for residence is no longer exist within the period of the residence. Where an alien meets one of the following circumstances, however, he/she may be permitted to reside continually:1. His/Her sponsor is deceased.2. Is a spouse of a national with household registration in the Taiwan Area and is divorced due to domestic violence and has not remarried.3. Factually fosters, exercises rights and assumes obligations for, or meets and communicates with minor children with household registration in the Taiwan Area after his/her divorce.4. Is deported from the State due to the revocation of his/her residence permit and is believed to have caused severe and irrecoverable hardship to his/herminor children with household registration in the Taiwan Area.5. Has a labor dispute with the domestic employer and the lawsuit procedure is in the process.6. Suffers from occupational injury and is still under treatment.7. Is a victim or a witness involved in a criminal case and necessary to render assistance in the investigations or the trial if attending at the court or being deposed as determined by the prosecutor or the judge.8. Is prohibited from exiting the State pursuant to Paragraph 1 of Article 21.9. Obtains the residence permit through his/her spouse, who is a national of the State, as a sponoser and remarries the original sponoser within thirty (30) days after his/her divorce.One who is permitted to reside continually pursuant to Subparagraph 3 or 4 of the preceding Paragraph may be permitted to reside continually after his/her minor children become adults.In the event that an alien changes his/her resident address or his/her place of employment during the period of his/her residence, he/she shall apply to the National Immigration Agency for registering the change within thirty (30) days, calculating from the next day of the occurrence of the event.
中文原文 入出國及移民法第31條
外國人停留或居留期限屆滿前，有繼續停留或居留之必要時，應向移民署申請延期。
依前項規定申請居留延期經許可者，其外僑居留證之有效期間應自原居留屆滿之翌日起延期，最長不得逾三年。
外國人逾期居留未滿三十日，原申請居留原因仍繼續存在者，經依第七十四條之一第二項規定處罰後，得向移民署重新申請居留；其申請永久居留者，核算在臺灣地區居留期間，應扣除一年。
移民署對於外國人於居留期間內，居留原因消失者，廢止其居留許可，並註銷其外僑居留證。
但有下列各款情形之一者，得准予繼續居留：
一、因依親對象死亡。
二、外國人為居住臺灣地區設有戶籍國民之配偶，因遭受家庭暴力離婚，且未再婚。
三、外國人於離婚後對在臺灣地區已設有戶籍未成年子女，有撫育事實、行使負擔權利義務或會面交往。
四、因居留許可被廢止而遭強制出國，對在臺灣地區已設有戶籍未成年子女造成重大且難以回復損害之虞。
五、外國人與本國雇主發生勞資爭議，正在進行爭訟程序。
六、外國人發生職業災害尚在治療中。
七、刑事案件之被害人、證人有協助偵查或審理之必要，經檢察官或法官認定其到庭或作證有助於案件之偵查或審理。
八、依第二十一條第一項規定禁止出國。
九、外國人以配偶為依親對象，取得居留許可，其依親對象為我國國民，於離婚後三十日內與原依親對象再婚。
依前項第三款、第四款規定准予繼續居留者，其子女已成年，得准予繼續居留。
外國人於居留期間，變更居留住址或服務處所時，應於事實發生之翌日起算三十日內，向移民署申請辦理變更登記。
依前項規定申請居留延期經許可者，其外僑居留證之有效期間應自原居留屆滿之翌日起延期，最長不得逾三年。
外國人逾期居留未滿三十日，原申請居留原因仍繼續存在者，經依第七十四條之一第二項規定處罰後，得向移民署重新申請居留；其申請永久居留者，核算在臺灣地區居留期間，應扣除一年。
移民署對於外國人於居留期間內，居留原因消失者，廢止其居留許可，並註銷其外僑居留證。
但有下列各款情形之一者，得准予繼續居留：
一、因依親對象死亡。
二、外國人為居住臺灣地區設有戶籍國民之配偶，因遭受家庭暴力離婚，且未再婚。
三、外國人於離婚後對在臺灣地區已設有戶籍未成年子女，有撫育事實、行使負擔權利義務或會面交往。
四、因居留許可被廢止而遭強制出國，對在臺灣地區已設有戶籍未成年子女造成重大且難以回復損害之虞。
五、外國人與本國雇主發生勞資爭議，正在進行爭訟程序。
六、外國人發生職業災害尚在治療中。
七、刑事案件之被害人、證人有協助偵查或審理之必要，經檢察官或法官認定其到庭或作證有助於案件之偵查或審理。
八、依第二十一條第一項規定禁止出國。
九、外國人以配偶為依親對象，取得居留許可，其依親對象為我國國民，於離婚後三十日內與原依親對象再婚。
依前項第三款、第四款規定准予繼續居留者，其子女已成年，得准予繼續居留。
外國人於居留期間，變更居留住址或服務處所時，應於事實發生之翌日起算三十日內，向移民署申請辦理變更登記。