21 Pa. Stat. § 185
The provisions of the third section of the act of assembly of this commonwealth, approved December 14, 1854, authorizing acknowledgments, in certain cases, to be taken before any officer or magistrate of the state wherein such deeds, powers of attorney, or other instruments of writing, therein mentioned, are executed, be and are hereby extended so as to authorize such acknowledgments to be taken before any officer or magistrate of any territory of the United States, created and organized by act of Congress, authorized by the laws of such territory to take acknowledgments of such deeds, powers of attorney, or other instruments of writing; and all deeds, powers of attorney or other instruments of writing which have been executed prior to the passage of this act, in any territory, created by act of Congress, and acknowledged before any officer or magistrate of such territory, authorized by the laws of such territory to take acknowledgments of deeds, powers of attorney, or other instruments of writing, shall be as valid, to all intents and purposes, as if such territory had been one of the states of this Union.
21 P.S. § 185