Whenever any new armory construction is to be made by the Armory Commission of Alabama out of any state moneys without federal aid, the Armory Commission of Alabama shall submit the plans and specifications for such new construction to the technical and engineering staff of the Building Commission of 1945 for technical and engineering approval, and all bids asked for and contracts let shall be under the supervision of the technical and engineering staff in consultation with the Armory Commission, and the technical and engineering staff of the Building Commission of 1945 shall inspect, supervise, and approve the construction of such armories. Whenever any new armories are to be built by the Armory Commission of Alabama involving the expenditure of state funds and the expenditure of federal funds, on the basis of matching of state and federal funds, the plans and specifications for such new armory construction shall be subject to the technical and engineering approval of the technical and engineering staff of the Building Commission of 1945 on behalf of the state and such agencies of the federal government as may be designated by the proper federal authority, and the technical and engineering staff of the Building Commission of 1945 shall inspect, supervise, and approve the construction of such buildings on behalf of the state. Except as otherwise provided in this section, the Armory Commission of Alabama shall retain and exercise exclusively all of the rights, powers, authority, functions, and duties imposed and entrusted to it by this chapter.