All bills, claims, and demands for military purposes shall be certified and audited as prescribed by law and shall be paid from the state general fund in the normal manner upon submission of vouchers by the adjutant general. If the organized militia, or any part of it, is called into active service of the state in case of war, disaster, insurrection, rebellion, tumult, riot, invasion, breach of peace, or to execute or enforce the law, vouchers for legally allowed pay and expenses for this service or compensation for injuries shall be drawn upon the general fund of the state treasury and paid out of money in that fund not otherwise appropriated.