72 Pa. Stat. § 1501
No money shall be paid out of any fund in the State Treasury, except (1) the State Workmen's Insurance Fund, and except (2) the Surplus Commodities Stamp Fund, until a requisition therefor shall have been presented to or prepared by the State Treasurer.
For money appropriated to the Governor or to the Executive Board, the Governor shall prepare requisitions and present them to the Treasury Department.
For money appropriated to the Lieutenant Governor he shall prepare requisitions and present them to the Treasury Department.
For money appropriated to administrative departments, or to independent administrative boards or commissions, the respective departments, boards, or commissions, shall prepare their requisitions, with the written approval of their respective department heads and departmental comptrollers noted thereon, and present them to the Treasury Department.
Requisitions for payment shall be presented in such form, whether paper, electronic or otherwise, in accordance with generally commercially accepted methods. Requisitions for payment may be presented to the Treasury Department by electronic transmission which shall evidence the approval of the comptroller and department head.
For money appropriated to departmental administrative boards or commissions, or advisory boards or commissions, such boards or commissions shall prepare requisitions, and forward them to the departments with which they are respectively connected. Such departments, if they approve the requisitions, shall so signify in writing, and shall transmit them to the Treasury Department. No requisition of a departmental administrative board or commission, or of an advisory board or commission, shall be valid without the approval in writing of the head and the comptroller of the department with which such board or commission is connected.
For money appropriated to a person, association, corporation, or agency, not a part of the executive branch of the State Government, the person, association, corporation, or agency, to whom or to which the appropriation was made, shall prepare requisitions and present them to the Treasury Department, but whenever, in any such case, any other act of Assembly requires the requisition to be approved by an administrative department of the State Government, other than the Treasury Department, it shall be forwarded to the Treasury Department through such other administrative department.
For money appropriated for a purpose, without designation of the expending agency, the Treasury Department shall prepare requisitions except as to appropriations for the purposes of the judiciary for which the Court Administrator of Pennsylvania shall prepare, supervise or delegate preparation of requisitions and present them to the Treasury Department. Such requisitions shall include those for the payment of the salaries, compensations and expenses of all justices, judges, district justices, employes, boards, commissions and other agencies of the judicial department who are paid from Commonwealth appropriations.
72 P.S. § 1501