; and (ii) if such head submits a notification and justification to the appropriate congressional committees not later than 30 days after granting such waiver. (B) Duration (i) In general Except as provided in clause (ii), a waiver granted under subparagraph (A) shall last for a period of not more than 365 days. (ii) Extension The Director of the Office of Management and Budget, in consultation with the Federal Acquisition Security Council and the Secretary of Defense, may extend a waiver granted under subparagraph (A) one time, for a period up to 180 days after the date on which the waiver would otherwise expire, if such an extension is in the national security interests of the United States and the Director submits to the appropriate congressional committees a notification of such waiver. (2) Overseas health care services The head of an executive agency may waive the prohibitions under subsections (a) and (b) with respect to a contract, subcontract, or transaction for the acquisition or provision of health care services overseas on a case-by-case basis— (A) if the head of such executive agency determines that the waiver is— (i) necessary to support the mission or activities of the employees of such executive agency described in subsection (e)(2)(A); and (ii) in the interest of the United States; (B) with the approval of the Director of the Office of Management and Budget, in consultation with the Federal Acquisition Security Council and the Secretary of Defense; and (C) if such head submits a notification and justification to the appropriate congressional committees not later than 30 days after granting such waiver. (e) Exceptions The prohibitions under subsections (a) and (b) shall not apply to— (1) any activity subject to the reporting requirements under title V of the National Security Act of 1947 ( 50 U.S.C. 3091 et seq. ) or any authorized intelligence activities of the United States