In addition to National Environmental Policy Act (NEPA) compliance, when an FAA action involves a resource protected under a special purpose law, the FAA may be required to consult with other appropriate Federal or state agencies to fulfill coordination, consultation, and/or public notice requirements. These requirements are found in Section 106 of the National Historic Preservation Act (NHPA), Section 7 of the Endangered Species Act (ESA), Section 4(f) of the U.S. Department of Transportation Act, and Tribal consultation laws. See below to view consultation letters sent to gather information and to satisfy these requirements.