This part sets forth the policy, procedure, and responsibilities to implement and enforce relevant sections of the National Flood Insurance Act of 1968, as amended, and the Flood Disaster Protection Act of 1973, as amended, 42 U.S.C. 4001 et seq., the National Environmental Policy Act of 1969, 42 U.S.C. 4321 et seq., as amended, and other relevant statutory authorities in conjunction with Executive Order 11988, Floodplain Management, as amended, and Executive Order 11990, Protection of Wetlands.