Modification of Class E Airspace; Muskegon, MI

This action modifies Class E airspace at Muskegon, MI. This action corrects the times of operation of the Class E airspace extension associated with the Class D airspace for Muskegon County Airport, and amends the Class E surface area for the airport to include an airspace extension. The purpose of these actions is to make the Class D airspace and the associated Class E airspace extension for the airport consistent with each other, and to provide adequate controlled airspace for instrument approach procedures when the airport traffic control tower (ATCT) is closed.