16 U.S.C. § 410yy–3: Acquisition of property

(a) In generalSubject to subsections (b) and (c), the Secretary is authorized to acquire lands, or interests therein, within the boundaries of the park by donation, purchase with donated or appropriated funds, exchange, or transfer. (b) State propertyProperty owned by the State of Michigan or any political subdivision of the State may be acquired only by donation. (c) ConsentNo lands or interests therein within the boundaries of the park may be acquired without the consent of the owner, unless the Secretary determines that the land is being developed, or is proposed to be developed in a manner which is detrimental to the natural, scenic, historic, and other values for which the park is established.