Procedures should be established for revoking takeoff clearances and issuing instructions to abort takeoff.

For aircraft that have been cleared for takeoff, there should be buttons to revoke the takeoff clearance and to abort the takeoff. The distinction between these buttons should be based on whether the aircraft has begun taxiing. For aircraft that have not yet entered the runway or are in the process of aligning with it, revoking the clearance should result in the aircraft waiting in place for further instructions; for aircraft that have already gained speed, the aircraft should decelerate and come to a stop on the runway to await further instructions; for aircraft whose speed exceeds V1 at the time of the call, the aircraft should continue its takeoff.