During the biennium immediately after publication, the secretary of state must sell copies of the session laws for the cost of publication and handling plus ten percent. In subsequent bienniums the secretary of state may determine and set a price for the copies of the session laws not sold in the biennium immediately after their publication. The price set should maximize the recovery of the cost of publication and handling and minimize the number of volumes subject to disposal under section 46-04-19. All moneys received under the provisions of this section must be paid over to the state treasurer and credited to the general fund.