The Secretary of Homeland Security is the principal Federal official responsible for transportation security. The roles and responsibilities of the Department of Homeland Security and the Department of Transportation in carrying out this chapter are the roles and responsibilities of such Departments pursuant to the Aviation and Transportation Security Act (); the Intelligence Reform and Terrorism Prevention Act of 2004 (); the National Infrastructure Protection Plan required by Homeland Security Presidential Directive–7; The  Homeland Security Act of 2002 [ et seq.]; The  National Response Plan; Executive Order No. 13416: Strengthening Surface Transportation Security, dated ; the Memorandum of Understanding between the Department and the Department of Transportation on Roles and Responsibilities, dated , and any and all subsequent annexes to this Memorandum of Understanding; and any other relevant agreements between the two Departments.Public Law 107–71Public Law 108–45816 U.S.C. 1011December 5, 20062006-12-05September 28, 20042004-09-28