Class D airspace.
CFR · 2024-01-01 · US · Title 14
The Class D airspace areas listed in subpart D of FAA Order JO 7400.11H (incorporated by reference, see § 71.1) consist of specified airspace within which all aircraft operators are subject to operating rules and equipment requirements specified in part 91 of this chapter. Each Class D airspace area designated for an airport in subpart D of FAA Order JO 7400.11H (incorporated by reference, see § 71.1) contains at least one primary airport around which the airspace is designated.
official document · source cfr-2024 · id 14:§ 71.61