14 C.F.R. § 93.313 Communications.
Title 14 - Aeronautics and Space
Except when in contact with the Grand Canyon National Park Airport Traffic Control Tower during arrival or departure or on a search and rescue mission directed by the U.S. Air Force Rescue Coordination Center, no person may operate an aircraft in the Special Flight Rules Area unless he monitors the appropriate frequency continuously while in that airspace.
Title 14: Aeronautics and Space
PART 93—SPECIAL AIR TRAFFIC RULES
Subpart U—Special Flight Rules in the Vicinity of Grand Canyon National Park, AZ
§ 93.313 Communications.
