Between July 1, 1991, and July 1, 1993, the Connecticut Marketing Authority shall, for the purposes of improvement and maintenance of railroad track owned by said authority, charge a fee of fifty dollars for each round trip made by a railroad car over said track. The fee shall be paid to the authority by the person or persons receiving the railroad car. On and after July 1, 1993, such fee shall be established by the board of directors of the Connecticut Marketing Authority by regulations adopted in accordance with the provisions of chapter 54.