View all text of Subpart U [§ 93.301 - § 93.325]
§ 93.311 - Minimum terrain clearance.
Except in an emergency, when necessary for takeoff or landing, or unless otherwise authorized by the responsible Flight Standards Office for a purpose listed in § 93.309(c), no person may operate an aircraft within 500 feet of any terrain or structure located between the north and south rims of the Grand Canyon.