Regulations Governing the Establishment of the Advisory Committee of Food Advertisement and Labeling Article 6

The convener shall be the chairperson of the meeting, and the vice-convener may act as the chairperson for the convener who fails to attend the meeting. When both convener and vice-convener fail to attend the meeting, the convener may designate one of the members as the chairperson; where designation is impossible, the chairperson may be elected by all attending members from among themselves.
中文原文 食品廣告標示諮議會設置辦法第6條
本會會議由召集人擔任主席;召集人不克出席時,由副召集人代理之;召集人及副召集人均未能出席時,由召集人指定委員一人為主席;不克指定時,由出席委員互推之。

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