Operation and Maintenance, Air Force

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; and not to exceed $2,538,000 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; $8,335,279,000, of which not less than $509,000,000 shall be available only for the maintenance of real property facilities.