Aircraft equipped with two-way radios will monitor the control tower frequency while in the airport air traffic pattern area.
Except in emergencies, or unless otherwise authorized by the control tower, flight operations on or about the airport will only be permitted if the aircraft is equipped with functioning two-way radio equipment. Contact with the control tower during its hours of operation, must be maintained at all times. The aircraft shall remain in contact with the control tower until it leaves the area or has been parked.
(Res. No. 149 75-76 (part))