All moneys received or raised in any city of the 1st class, however incorporated, for parks and boulevards, under the control of a board of park commissioners, shall be paid over to the city treasurer and shall be disbursed according to resolutions of the board of park commissioners authorizing the payment of bills and accounts after same have been audited and orders directed to be issued therefor, which shall be signed by the president and secretary of the board, except that said funds may by resolution of said board of park commissioners be disbursed upon orders signed by the president and secretary of the board of park commissioners, and countersigned by the comptroller after bills or accounts have been presented to and audited by the comptroller. All bills or accounts thus paid shall be reported by said secretary to the next regular meeting of the board of park commissioners. Such orders shall be made payable to the order of the persons in whose favor they shall have been issued, and shall be the only vouchers of the treasurer for payment from the park fund. It shall not be lawful for the board of park commissioners to expend or contract a liability for any sum in excess of the amount levied in any one year for the park fund on account of such fund.