Canadian Aviation Regulations (SOR/96-433)

901.20 (1) No pilot shall operate a remotely piloted aircraft system if visual observers are used to assist the pilot in detecting and avoiding conflicting air traffic and other hazards unless reliable and timely communication is maintained between the pilot and each visual observer during the operation.

(2) A visual observer shall communicate information to the pilot in a timely manner, during the operation, whenever the visual observer detects conflicting air traffic, hazards to aviation safety or hazards to persons on the surface.

(3) No visual observer shall perform visual observer duties for more than one remotely piloted aircraft at a time unless the aircraft are operated in accordance with subsection 901.40(1) or in accordance with a special flight operations certificate — RPAS issued under section 903.03.

(4) No visual observer shall perform visual observer duties while operating a moving vehicle, vessel or aircraft.