Mich. Comp. Laws § 54.234: Tract extending from 1 coordinate zone into another coordinate zone; reference to boundaries.

Sec. 4.

If a tract of land is defined by a single description and extends from 1 into another of the coordinate zones described in section 1, the positions of all points on the tract's boundaries may be referred to either of the 2 zones. The zone which is used for reference shall be specifically named in the description.