Plain English Meaning
The rules you have to follow when flying through a particular piece of sky — who you have to talk to, what gear you need on board, and any limits on where and how you can fly there.
Full Definition
The published rules and operating practices that govern how aircraft are flown within a specific class or block of airspace, including entry requirements, communication requirements, equipment requirements, altitude rules, and any temporary restrictions in effect.
Context Anchor
You may hear or see this term in recorded flight briefings, airport information, chart notes, or instructions about flying near controlled or restricted areas.