Compiled Laws, Chapter 750. Michigan Penal Code § 750.402

Sec. 402.CERTAIN SOCIETIES PARADING UNDER ARMS--Any society whose membership is confined to members of a certain race, which has heretofore adopted a uniform similar to the uniform of the organized militia of this state, may continue to wear the same when appearing in public, but the governor of this state may, by a proper order, in times of public tumult, direct that such societies shall not parade under arms, and if any society disobey such order, the persons so violating said order shall be guilty of a misdemeanor.