Mo. Rev. Stat. § 444.410

The governor shall appoint one member and one alternate member to represent Missouri's interests on the interstate mining commission. Such appointment shall be with the advice and consent of the senate, as provided in Section 51 of Article IV of the Constitution of Missouri. The state's member on the commission, or the alternate, shall be entitled to reimbursement for expenses necessarily incurred in the discharge of his official duties plus, if not an employee of the state, fifty dollars for each day devoted to the affairs of the commission.