53 Pa. Stat. § 16471
The mayor, the presidents of the select and common councils, commissioners of city property, the chief engineer and surveyor, and the chief engineer of the water-works of said city, together with ten citizens of said city, who shall be appointed for five years, five of them by the district court, and five of them by the court of common pleas of said city, be and the same are hereby constituted commissioners of said park; they shall organize annually, on the first Monday of June, by the election of a president and secretary, but they shall receive no compensation for their service as commissioners: Provided, That whenever a vacancy shall occur in that part of the said commissioners appointed by the courts, the court from which the appointment is made shall fill the vacancy.
53 P.S. § 16471