16 Pa. Stat. § 5512-A
The Authority shall have the power to acquire by purchase or eminent domain proceedings either the fee or such right, title, interest or easement in such lands as the Authority may deem necessary for the purpose mentioned in this article: Provided, however, That no property owned or used by the United States, the Commonwealth, any political subdivision thereof, or any body politic and corporate organized as an "authority" under any law of the Commonwealth or by any agency or any of them, nor any property of a public service company, property used for burial purposes, places of public worship, shall be taken under the right of eminent domain. The right of eminent domain shall be exercised by the Authority in the manner provided by law for the exercise of such right by municipalities of the same class as the municipality by which such Authority was organized. In the case of a joint authority, right of eminent domain shall be exercised by the Authority in the same manner as is provided by law for the exercise of such right by municipalities of the same class as the municipality in which the right of eminent domain is to be exercised, except that where the right is to be exercised in a city located in a county and both are members of the Authority, the law established for the city shall govern.
16 P.S. § 5512-A