Cooperatives Act Article 66

Two or more cooperatives or cooperatives unions may establish a cooperatives union according to the relation in geography or business.
中文原文 合作社法第66條
二以上之合作社或合作社聯合社,因區域上或業務上之關係,得設立合作社聯合社。

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