Modification of Class E Airspace; West Yellowstone, MT
This action will modify Class E airspace at West Yellowstone, MT, to accommodate aircraft using a new Area Navigation (RNAV) Global Positioning System (GPS) Standard Instrument Approach Procedure (SIAP) at West Yellowstone Airport. This will improve the safety and management of Instrument Flight Rules (IFR) operations at the airport. This action also includes minor adjustments in the legal description of the airspace.