Section 4. The sum of two hundred and fifty thousand dollars ($250,000), or as much thereof as may be necessary, is hereby specifically appropriated to The Delaware River Joint Commission, to be used by it, together with a like appropriation made by the State of New Jersey, for any of the purposes of the said commission, except the operation, maintenance, improvement or construction of new facilities for the existing bridge over the Delaware River between Philadelphia and Camden. The money hereby appropriated shall be disbursed upon requisition of the Governor, presented to the Auditor General, who shall direct his warrant upon the State Treasurer in the usual manner.