Each member of the state dental board shall receive an amount fixed pursuant to division (J) of section 124.15 of the Revised Code for each day actually employed in the discharge of the official duties of the member, and the necessary expenses of the member. The secretary and vice-secretary shall be reimbursed for necessary expenses incurred in the discharge of the official duties of the secretary and vice-secretary, respectively. All vouchers of the board shall be approved by the board president or executive secretary, or both, as authorized by the board.