Mich. Comp. Laws § 426.153: Logs; unlawful marking.

Sec. 3.

It shall be unlawful for any person other than the owner thereof, or by his consent, to make or place, or cause to be made or placed, any mark upon any log, spar, spile, boomstick, railroad tie, post, shinglebolt, timber or lumber floating upon or lying in any river, stream, lake, pond, bay, inlet or bayou or any other waters within this state or in any boom therein or on or near the shores or banks thereof.