204 Pa. Code § 29.2
Pursuant to the authority granted by Acts 352 and 359 of the 1968 Session of the Pennsylvania General Assembly, the Court of Common Pleas of each Judicial District numbered 2 through 59 is hereby directed to certify promptly to the State Treasurer the number of persons residing within each magisterial district within said Court's Judicial District for salary purposes only, under Section 5(b) of said Acts of Assembly. For determining population for said purpose, said Courts are hereby authorized to utilize 1960 Federal Census or subsequent Federal Census population figures, and make certification without further approval from this Court. If any of said Courts desire or need to use state or local agency population figures or estimates, or other than Federal Census figures, said population figures or estimates, along with the source of said figures or estimates, shall first be submitted to this Court for approval before certification to the State Treasurer. Copies of the final certification shall be sent to the State Court Administrator.
204 Pa. Code § 29.2