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Notice of proposed rulemaking (NPRM).

This action proposes to modify the Class E airspace extending upward from 700 feet above the surface of the earth to provide additional instrument flight procedure containment at Yellowstone Regional Airport, Cody, WY. Additionally, this action proposes administrative amendments to update the airport's Class E airspace legal description. These actions would support the safety and management of instrument flight rules (IFR) operations at the airport.

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