Chapter 15. Class B AirspaceSection 1. General15-1-1. PURPOSE15-1-2. NONRULEMAKING ALTERNATIVES15-1-3. RESPONSIBILITIES15-1-4. SERVICE CENTER EVALUATIONSection 2. Class B Airspace Planning15-2-1. CRITERIA15-2-2. DESIGNATION15-2-3. CONFIGURATION15-2-4. IFR TRANSITION ROUTES15-2-5. VFR CONSIDERATIONS15-2-6. CHART ENHANCEMENTSSection 3. Class B Airspace Processing15-3-1. OVERVIEW15-3-2. STAFF STUDY15-3-3. PRE-NPRM AIRSPACE USER COORDINATION15-3-4. NPRM PHASE15-3-5. POST-NPRM PROCESSING15-3-6. REVOKING CLASS B AIRSPACE