The Regulations Governing Rewards to Prisoners Article 8

The period of the prisoner’s home visiting shall be counted towards the term of sentence. However, where the prisoner fails to return to the prison by the designated time period without a justifiable reason, the number of days of the prisoner’s outside the prison shall not be counted towards the term of sentence.The prisoner for the home visiting shall still report to the prison by the originally-designated returning period if the prisoner cannot make it back to the prison by the designated returning period for any of the following justifiable reasons:1. Traffic interruption or urgent matters for attention, which is caused by natural disasters or other unavoidable incidents; or2. Treatment of diseases under hospitalization or isolation due to diseases, where the fact is supported with a certificate by public or private hospital.After receiving the report from the prisoner as stated in the preceding paragraph, the prison shall designate another returning time for the prisoner and order the prisoner to report to the prison at scheduled time.The returning period in the preceding paragraph shall be limited to eight hours after the expiry of the justifiable reason as determined by the prison.With respect to the matters under Paragraphs 2 and 3, the prison shall report to the supervisory authority for record.
中文原文 受刑人獎勵實施辦法第8條
返家探親之受刑人,其在外期間,算入刑期內。
但在指定期間內無正當理由而未回監者,其在外日數不算入刑期內。
返家探親受刑人有下列各款正當理由之一,未於指定期日回監時,應於原指定回監期日內向監獄報告:
一、因天災或其他不可避之事變,致交通中斷或急需處理者。
二、因疾病,經公、私立醫院證明住院醫療或隔離者。
監獄接獲前項報告後,應另行指定受刑人回監期日,並令其定時回報。
前項回監期日,以監獄認定已無正當理由後之八小時為限。
第二項及第三項事由,監獄應陳報監督機關備查。

English translation for reference only; the Chinese text prevails. Not legal advice.