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Notice of proposed rulemaking (NPRM).

This action proposes to modify the Class E airspace, designated as a surface area, and the Class E airspace extending upward from 700 feet above the surface at Williston Basin International Airport, Williston, ND. The proposed airspace modifications support the establishment of new instrument procedures for runways 04 and 22. This action also proposes to update the geographic coordinates in the Class E2 and Class E5 text headers. This action would ensure the safety and management of instrument flight rules (IFR) operations at the airport.

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