Regulations for the Mediation of Labor-Management Disputes Article 23

When a mediator or a member of mediation committee deems it as necessary that the parties to the dispute, a person concerned or business entity shall make statements for the purpose of finding the fact, the local competent authority shall in advance notify them in writing.In case that a mediator or an assigned member of mediation committee deems it as necessary to interview a related business entity for the purpose of finding the fact, he/she shall obtain a written permission from the local competent authority in advance, and proactively display the permission when engaging in the interview.In case that a member of mediation committee who is chosen by the parties to labor-management dispute or is designated by the local competent authority in accordance with Paragraph 1 to Article 14 of the Act has the reasons to recuse prescribed in Paragraph 1 to Article 9 of the Regulations, he/she shall not be assigned to conduct the fact-finding.
中文原文 勞資爭議調解辦法第23條
調解人、調解委員為調查事實而有使當事人、相關人員或事業單位提出說明之必要時,應由地方主管機關事先以書面通知之。
調解人、受指派之調解委員為調查事實而有進入相關事業單位訪查之必要時,應事先取得地方主管機關之書面同意,並於進行訪查時,主動出示證明。
依本法第十四條第一項規定由勞資爭議當事人選定之調解委員或由地方主管機關代為指定之調解委員,有第九條第一項所定迴避事由者,不得受指派進行事實調查。

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