The Secretary is authorized, pending the implementation of the final system plan, to pay to the trustees of railroads in reorganization such sums as are necessary for the continued provision of essential transportation services by such railroads. Such payments shall be made by the Secretary upon such reasonable terms and conditions as the Secretary establishes, except that recipients must agree to maintain and provide service at a level no less than that in effect on January 2, 1974. Where the Secretary and the trustees agree that funds provided pursuant to this section are to be used (together with funds provided pursuant to section 725 of this title, if any) to perform program maintenance on designated rail properties until the date rail properties are conveyed under this chapter or to improve such designated properties, such agreement shall contain the conditions set forth in section 725(b) of this title.

There are authorized to be appropriated to the Secretary for carrying out this section such sums as are necessary, not to exceed $282,000,000, to remain available until expended. Of amounts authorized to be appropriated under this subsection, $50,000,000 shall be available solely to pay to the trustees of railroads in reorganization such sums as may be necessary to provide such railroads with amounts equal to revenues attributable to tariff increases proposed by such railroads and suspended by the Interstate Commerce Commission during the calendar year 1975, if the Secretary determines that such payments are necessary to carry out this section.