There is hereby imposed a fee of fifty dollars for each application for any permit made to the board pursuant to sections 2-2701 to 2-2711. Such fee shall be in addition to the fees provided for in section 2-2705 and shall be paid to the department. All fees collected by the department pursuant to this section shall be remitted to the State Treasurer for credit to the Tractor Permit Cash Fund, which fund is hereby created. The fund shall be used by the department to defray the expenses of administering sections 2-2701 to 2-2711. Any money in the fund available for investment shall be invested by the state investment officer pursuant to the Nebraska Capital Expansion Act and the Nebraska State Funds Investment Act.