74 Pa. Stat. § 15
The consent of the state of Pennsylvania is hereby given to the acquisition by the United States, by purchase or by condemnation, under the laws of this state, of such pieces of land situate in the state of Pennsylvania, or the navigable waters within the limits of the jurisdiction of the state of Pennsylvania, each piece not to contain more than ten acres, as may be selected by the light house board of the United States, for the purpose of erecting light houses and beacons on the rivers Delaware and Schuylkill; and the said United States shall have, hold, use, occupy and own the said land or lands when purchased or acquired, and exercise jurisdiction and control over the same and every part thereof, subject to the restrictions hereinafter mentioned.
74 P.S. § 15