(a) For payment of the cost of maintenance and operation of the bridges;
(b) For payment of installments of principal and of interest maturing upon bonds of the authority, if any;
(c) For payments from time to time in such amounts as the authority shall deem necessary to be contributed to a city pursuant to subdivision ten-b of section five hundred twenty-eight of this chapter. 3. None of the bridges constructed prior to January first, nineteen hundred fifty-eight, shall be free from tolls until all of such bridges are free therefrom, subject to such agreements with bondholders and noteholders as may be made as hereinafter provided, and the rates of tolls on the Franklin Delano Roosevelt Mid-Hudson bridge, the Kingston-Rhinecliff bridge, the Bear Mountain bridge, the Rip Van Winkle bridge, and the Hamilton Fish Newburgh-Beacon bridge shall be uniform.