All revenues collected as permit fees, admissions, use charges, rentals, compensation for concession agreements, or otherwise, with the exception of revenue from bequests, trusts, or gifts, and with the exceptions noted in subdivisions a and b of subsection 4 of section 55-08-06, must be placed in the state park fund, together with all proceeds of bonds issued pursuant to section 55-08-08. This fund must be maintained by the state treasurer as a special trust fund and is irrevocably appropriated and must be used and disbursed solely for the following purposes:

1.    To pay the current cost of furnishing each special service provided in accordance with this chapter. For this purpose the charges, fees, and rentals for each service must be credited to a special operating account, from which must be paid only the current, reasonable, and necessary cost of operating that service, determined in accordance with accepted accounting practice, including the purchase price of merchandise and utilities sold and the compensation of employees necessarily attributable to the furnishing of that service. The director may incur no operating cost for any building, structure, or facility leased, and the leases must provide for the payment of the costs by the lessee and for the payment of a net rental in addition to the costs.

2.    To provide for the payment and security of the principal and interest when due on any state park revenue bonds issued under section 55-08-08. For this purpose the treasurer shall credit to a special service account within the state park fund, as     received, all bond proceeds, all motor vehicle permit fees and all rental payments by lessees, and all net income remaining in the operating account for each special service at the end of each month, in excess of the costs of operation thereof which are then payable or are to become due and payable within one month, and shall transfer from this fund and account to the revenue bond fund described in section 55-08-09, whenever necessary, so much of the revenues then on hand as may be required to produce a balance in the revenue bond fund equal to the interest due and to become due within eighteen months plus the principal due and to become due within twenty-four months thereafter on all outstanding series of the bonds.

3.    To finance the acquisition, construction, reconstruction, improvement, betterment, or extension of the department’s properties, for projects within state parks, state campgrounds, state recreation areas, and reserves including the acquisition of land and water, the erection of buildings and structures, and the improvement of properties held in trust for or leased by the state, as authorized by the legislative assembly. For this purpose the director shall authorize the disbursement of bond proceeds and revenues received in the fund. However, a disbursement may not be made in excess of the amounts of revenue bonds issued and other funds granted or appropriated and received for this purpose, and no disbursements may be made at any time when the balance in the revenue bond fund is less than specified in subsection 2.

4.    For any other purpose for which funds have been appropriated by the legislative assembly to the parks and recreation department. A disbursement may not be made at any time when the balance in the revenue bond fund is less than specified in subsection 2.