Amendment of Class D and Class E Airspace; Twin Falls, ID

This action modifies Class E airspace designated as an extension, and modifies Class E airspace extending upward from 700 feet above the surface at Joslin Field-Magic Valley Regional Airport, Twin Falls, ID. Also, the part-time Notice to Airmen (NOTAM) status is removed from Class E airspace designated as an extension. Additionally, an editorial change is made to the Class D airspace, Class E surface airspace, and Class E extension airspace legal descriptions replacing "Airport/Facility Directory" with the term "Chart Supplement." Also, this action removes the words "Twin Falls" from the airport name in the airspace designations for Class D and E airspace. These actions are necessary to accommodate airspace redesign for the safety and management of instrument flight rules (IFR) operations within the National Airspace System.