Michigan Compiled Laws, Chapter 454. Trade and Labor Associations § 454.157

Sec. 7. All societies, unions, or associations of tradesmen or laborers actually existing and conducting their affairs under a constitution or articles of association, may become a body corporate and politic, for the general purposes of this act, upon filing a copy of their constitution or articles of the association, society, or union, verified by the oath of 1 of the executive officers of such society, association, or union in the corporation and securities bureau of the department of commerce. All societies, unions, and associations, becoming corporations as above provided, shall be subject to the provisions of this act.