CAR 602.144 (Interception Order)

(1) No person shall give an interception signal or an instruction to land except

1. a peace officer, an officer of a police authority or an officer of the Canadian Forces acting within the scope of their duties; or
2. a person authorized to do so by the Minister pursuant to subsection (2).

(2) The Minister may authorize a person to give an interception signal or an instruction to land if such authorization is in the public interest and is not likely to affect aviation safety.

(3) The pilot-in-command of an aircraft who receives an instruction to land from a person referred to in subsection (1) shall, subject to any direction received from an air traffic control unit, comply with the instruction.

(4) The pilot-in-command of an intercepting aircraft and the pilot-in command of an intercepted aircraft shall comply with the rules of interception set out in the Canada Flight Supplement and repeated below.

SCHEDULE I

PROCEDURES TO BE FOLLOWED IN THE EVENT OF INTERCEPTION

The pilot-in-command of an aircraft intercepted by another aircraft shall immediately:

1. follow the radio and visual instructions given by the intercepting aircraft, interpreting and responding to visual Signals in accordance with Schedule II;
2. if possible, advise the appropriate air traffic services unit of the interception;
3. attempt to establish radio communication with the intercepting aircraft by making a general call on aeronautical emergency frequency 121.5 MHz and, if practicable, on emergency frequency 243.0 MHz, giving the identity and position of the aircraft and the nature of the flight; and
4. if equipped with a transponder, select Mode A Code 7700 unless otherwise instructed by the appropriate air traffic services unit.

Where any instructions received by radio from any source conflict with visual Signals received from the intercepting aircraft, the operator of the intercepted aircraft shall request immediate clarification from the intercepting aircraft or the appropriate air traffic services unit controlling the intercepting aircraft, while continuing to comply with the visual instructions received from the intercepting aircraft.

Where any instructions received by radio from any source conflict with those received by radio from the intercepting aircraft, the pilot-in-command of the intercepted aircraft shall request immediate clarification while continuing to comply with the radio instructions received from the intercepting aircraft.