; and for payments to the Department of Defense Military Retirement Fund, $3,406,137,000. II Operation and maintenance Operation and maintenance, army For expenses, not otherwise provided for, necessary for the operation and maintenance of the Army, as authorized by law, $38,483,846,000 (reduced by $5,000,000) (reduced by $5,600,000) (reduced by $6,000,000): Provided , That not to exceed $12,478,000 can be used for emergencies and extraordinary expenses, to be expended on the approval or authority of the Secretary of the Army, and payments may be made on his certificate of necessity for confidential military purposes. Operation and maintenance, navy For expenses, not otherwise provided for, necessary for the operation and maintenance of the Navy and the Marine Corps, as authorized by law, $45,980,133,000 (reduced by $598,000) (reduced by $7,000,000): Provided , That not to exceed $15,055,000 can be used for emergencies and extraordinary expenses, to be expended on the approval or authority of the Secretary of the Navy, and payments may be made on his certificate of necessity for confidential military purposes. Operation and maintenance, marine corps For expenses, not otherwise provided for, necessary for the operation and maintenance of the Marine Corps, as authorized by law, $6,885,884,000. Operation and maintenance, air force For expenses, not otherwise provided for, necessary for the operation and maintenance of the Air Force, as authorized by law, $38,592,745,000: Provided , That not to exceed $7,699,000 can be used for emergencies and extraordinary expenses, to be expended on the approval or authority of the Secretary of the Air Force, and payments may be made on his certificate of necessity for confidential military purposes. Operation and maintenance, defense-Wide (including transfer of funds) For expenses, not otherwise provided for, necessary for the operation and maintenance of activities and agencies of the Department of Defense (other than the military departments), as authorized by law,