The Regulations for Implementing Parental Leave Without Pay for Raising Children Article 5

During the period of unpaid parental leave for raising child(ren), if an employee on leave intends to terminate the labor contract, he (or she) shall process the termination in accordance with the related statutes and administrative regulations.
中文原文 育嬰留職停薪實施辦法第5條
育嬰留職停薪期間,受僱者欲終止勞動契約者,應依各相關法令之規定辦理。

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