An ATC clearance authorizes what?

• A. Permission to board passengers
• B. Clearance to descend below minimum safe altitude
• C. Authorization from ATC to proceed with a specific route or action (taxi, takeoff, or landing) and to cross holds
• D. Permission to rebook a flight

Answer: (C)

ATC clearance is the explicit authorization from air traffic control for a pilot to perform a specific movement or action in the controlled airspace or on the ground, and to proceed along a designated route while maintaining required separation. This includes being cleared to taxi to a runway, take off, or land, and to cross any held or required fixes along the way. It isn’t about boarding passengers or rebooking flights, and it doesn’t authorize actions outside the specified clearance. The main purpose is to ensure safe, orderly flow of traffic by approving exactly what the aircraft is allowed to do.