Aeronautics and space. Part71:Designation of class a,b,c,d,and e airspace areas,air traffic service routes,and reporting points. SubpartB:Class b airspace. Section71.41:Class b airspace.
The Class B airspace areas listed in subpart B of FAA Order 7400.9Y (incorporated by reference, see § 71.1) consist of specified airspace within which all aircraft operators are subject to the minimum pilot qualification requirements, operating rules, and aircraft equipment requirements of part 91 of this chapter. Each Class B airspace area designated for an airport in subpart B of FAA Order 7400.9Y (incorporated by reference, see § 71.1) contains at least one primary airport around which the airspace is designated.