Administrative Procedure Act Article 51

Unless otherwise provided by law, an administrative authority shall establish and announce by a public notice the time periods required for processing various categories of applications filed by the people under law and regulations.In the absence of processing time period established and announced under the preceding paragraph, the processing time period shall be two months. Where an administrative authority is unable to complete the process within the time period established in pursuance of the two preceding paragraphs, the process may be extended to the extent of the original processing time period, but for once only. In the circumstance referred to in the preceding paragraph, the applicant shall be notified of such extension prior to the expiration of the original processing time period. Where an administrative authority is prevented from processing its business by an act of God or any other event not attributable to it, the processing time period shall stop running until the discontinuation of such event.
中文原文 行政程序法第51條
行政機關對於人民依法規之申請,除法規另有規定外,應按各事項類別,訂定處理期間公告之。
未依前項規定訂定處理期間者,其處理期間為二個月。
行政機關未能於前二項所定期間內處理終結者,得於原處理期間之限度內延長之,但以一次為限。
前項情形,應於原處理期間屆滿前,將延長之事由通知申請人。
行政機關因天災或其他不可歸責之事由,致事務之處理遭受阻礙時,於該項事由終止前,停止處理期間之進行。

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