Mich. Comp. Laws § 3.901
The department of natural resources is authorized to convey by quitclaim deed or deeds the title to lands as is vested in the state and under the jurisdiction of the department of natural resources and to cede the offshore water area, without any monetary consideration, for and in behalf of the state, to the United States, which lie within the boundaries of the lakeshore zone and the parkway locations of the Sleeping Bear dunes national lakeshore as depicted on the map identified as "proposed Sleeping Bear dunes national lakeshore, United States department of the interior, national park service, boundary map NL-SBD-91,000, May, 1969", to be used by the United States department of the interior. The commission of natural resources shall approve the descriptions and total acreage of land to be conveyed and water area to be ceded, as well as the area to be excepted as provided in subdivision (b) of section 2 of the Public Laws 91-479.
MCL 3.901