The gross total income derived by the authority from:
shall be paid to the treasurer of the State of South Dakota or to a trustee under a resolution, trust indenture or other security agreement. The income shall beheld by the state treasurer or a trustee in trust for the purposes of this chapter, in a special fund known as the railroad authority fund. In all cases, the state treasurer shall be ex officio custodian of such fund. Disbursements shall be made from such fund upon the order of the authority.
SDCL 49-16B-41