To amend the Act of October 21, 1970, establishing the Sleeping Bear Dunes National Lakeshore to permit certain persons to continue to use and occupy certain areas within the lakeshore, and for other purposes.

Directs the Secretary of the Interior to notify owners of certain improved property constructed between December 31, 1964, and October 21, 1970, within the Sleeping Bear Dunes National Lakeshore in Michigan of their right to extend their (or their successor's) right of use and occupancy until the later of their death or 25 years.

Requires 180 days' prior notice for termination of such extension by the Secretary. Conditions an extension upon: (1) the annual payment by its recipient of a specified amount based on the value of the property (requires such payments to be retained by the Secretary and made available for maintenance and administration of the Lakeshore); and (2) agreements by the recipient to assume all responsibilities for repairs and maintenance, to indemnify and hold harmless the United States for any liability in connection with such property, and to make pro rata payments to local governments for services provided.

Authorizes the Secretary: (1) following an extension under this Act, to lease the property to any family member of such owner; and (2) after 180 days' notice, to terminate any such lease when the Secretary determines that the structures on the property will be removed and the property will be restored to its natural condition in order to improve the natural landscape and provide better opportunities for public access and enjoyment. Subjects such leases to the same conditions and lease payments provided under this Act.