Regulations on the Permission and Administration of the Employment of Foreign Workers Article 57

Should an employer find it necessary to continue the employment of a type E foreign worker within a period of 60 days prior to the expiration of the employment permit, said employer should submit the documents detailed in Subparagraph 1 and Subparagraphs 3 to 7, of Paragraph 1, Article 56, as part of an application to the Central Competent Authority for an employment permit extension.
中文原文 雇主聘僱外國人許可及管理辦法第57條
聘僱許可有效期限屆滿日前六十日期間內,雇主如有繼續聘僱該第五類外國人之必要者,於該期限內應備前條第一項第一款、第三款至第七款規定之文件,向中央主管機關申請展延聘僱許可。

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