Organization Regulations on Employee Welfare Committee Article 5

Two or more business entities may jointly form an employee welfare committee for facilitating the handling of welfare business. The committee members of business entities concerned shall be decided in accordance with the preceding two articles.
中文原文 職工福利委員會組織準則第5條
二個以上之事業單位,為辦理福利事業之便利,得聯合組織職工福利委員會。
其委員由參加之各單位依前二條規定辦理。

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