40 U.S.C. § 8732 — Acquiring land subject to limited rights reserved to grantor and limited permanent rights in land adjoining park propertyreserved

(a) In General. The National Capital Planning Commission may acquire, for the Federal Government, by gift, will, purchase, or condemnation: (1) full ownership of land where the seller keeps some limited rights (but not business-use rights); and (2) permanent rights over land next to park property, enough to stop certain uses of that land that would seriously hurt the value of the park. (b) Prerequisites to Acquisition. (1) Fee title to land subject to limited rights. The seller's reserved rights cannot last longer than the seller's own life. The Commission must decide that the reserved rights do not seriously hurt the permanent public park purposes the land is needed for, and that acquiring the land this way — subject to the limited rights — saves real money compared with buying the land with no rights attached. (2) Permanent rights in land adjoining park property. The Commission must decide that buying just the permanent rights, rather than the land itself, is a more economical way to protect and maintain the park's essential public values. (c) Presidential Approval Required. The President must approve every contract to acquire land or rights under this section.