; (5) the Committee on Oversight and Accountability of the House of Representatives; (6) the Committee on Homeland Security of the House of Representatives; (7) the Committee on Science, Space, and Technology of the House of Representatives; and (8) the appropriate authorization and appropriations committees of Congress (b) Initial notification (1) In general Not later than 72 hours after an agency has a reasonable basis to conclude that a major incident occurred, the head of the agency impacted by the major incident shall submit to the appropriate reporting entities a written notification, which may be submitted electronically and include 1 or more annexes that contain classified or other sensitive information, as appropriate. (2) Contents A notification required under paragraph (1) with respect to a major incident shall include the following, based on information available to agency officials as of the date on which the agency submits the notification: (A) A summary of the information available about the major incident, including how the major incident occurred and the threat causing the major incident. (B) If applicable, information relating to any breach associated with the major incident, regardless of whether— (i) the breach was the reason the incident was determined to be a major incident; and (ii) head of the agency determined it was appropriate to provide notification to potentially impacted individuals pursuant to section 3592(b)(1). (C) A preliminary assessment of the impacts to— (i) the agency; (ii) the Federal Government; (iii) the national security, foreign relations, homeland security, and economic security of the United States