(1) There is an earnings reserve account in the state special revenue fund.
(2) Funds are deposited in the earnings reserve account in accordance with the provisions of 77-1-108 (4)(a) and must be accounted for by trust.
(3) The balance of this account may not exceed two times the appropriation to the trust land administration account for the last completed fiscal year prior to the legislative session that will appropriate money for the next biennium.
(4) The earnings reserve account must be invested. Any interest earned must be deposited in the earnings reserve account in proportionate share to each fund's contribution to the account.