(2) The Sanitary District Sewerage System Revolving Fund is established separate and distinct from the General Fund. Moneys in the Sanitary District Sewerage System Revolving Fund are continuously appropriated to the State Treasurer for investment under the authority of this section. The interest paid on the investments purchased pursuant to this section shall be credited to the General Fund of the State of Oregon, and the principal, as it is repaid to the state by sanitary districts, shall be credited to the General Fund to be available for the payment of general governmental expenses. The State Treasurer is authorized to sell at not less than cost, the bonds, in whole or in part, that have been purchased under the authority of this section. The proceeds of sale of the bonds shall be credited to the General Fund to be available for the payment of general governmental expenses. [1959 c.425 §§1,2; 1963 c.341 §5; 1981 c.94 §40; 2005 c.755 §40]