and carry out plans for the management and operation of air traffic services within United States airspace and international airspace delegated to the United States. (c) Entities authorized To provide air traffic services after date of transfer After the date of transfer, no entity, other than the Corporation, is authorized or permitted to provide air traffic services within United States airspace or international airspace delegated to the United States, except for— (1) the Department of Defense, as authorized by chapter 909