Organic Act of the Control Yuan National Human Rights Commission Article 4

If the chairperson is absent or unable to exercise his/her duty, the vice chairperson shall act on his/her behalf; when both the chairperson and vice chairperson are absent or unable to exercise their duties, an acting chairperson shall be elected from among the NHRC members.
中文原文 監察院國家人權委員會組織法第4條
主任委員出缺或因故無法行使職權時,由副主任委員代理;主任委員、副主任委員均出缺或因故無法行使職權時,由委員互推一人代理主任委員。

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