5 ILCS 225/6
Whenever an agreement or contract is entered into between or among the Federal Railroad Corporation, the Department of Transportation, and any Contracting Parties, or any Association or Associations created pursuant to this Act for the provision by the Railroad Corporation of railroad passenger service, the costs related to such services shall be borne in such proportion as by agreement or contract the parties may determine. Nothing contained in this Act shall be interpreted to prevent any Contracting Parties or Association or Associations from contracting directly and solely with Federal Railroad Corporation for the reimbursement by the Contracting Parties or Association of such costs sustained by the Federal Railroad Corporation as agreed upon between the parties to the contract.
5 ILCS 225/6