Regulations for the Mediation of Labor-Management Disputes Article 7

The term of service of members of mediation committee appointed by the local competent authority shall be three years each term.During the term of service of a member of mediation committee, the local competent authority may appoint a new member if necessary, his/her term of service shall be until the term of service of other incumbent members referred to in the preceding paragraph is expired.
中文原文 勞資爭議調解辦法第7條
地方主管機關遴聘之調解委員,每屆任期為三年。
調解委員任期中,有增聘調解委員之必要,地方主管機關得增聘之,其任期至前項該屆調解委員任期屆滿為止。

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