The Mississippi Department of Transportation may accept federal funds to carry out the provisions of this chapter. All federal grants received under provisions of this chapter shall be expended for the purposes set forth in the federal grants. The transportation department, upon a finding that sufficient federal grants for railroad rehabilitation are not available, and with the approval of the State Fiscal Management Board, may make grants to railroad corporations in a total amount not to exceed Two Million Dollars ($2,000,000.00) from the Railroad Revitalization Fund.