Input (grade 13): By Secretary's Order No. 3210 of December 3, 1999, the United States Fish and Wildlife Service assumed administrative responsibility for Navassa, which became a National Wildlife Refuge Overlay, also known as Navassa Island National Wildlife Refuge.
Output (grade 5): On September 2, 1999, the U.S. Fish and Wildlife Service established the Navassa Island Wildlife Refuge as an overlay.