Canadian Aviation Regulations

901.35 (1) No pilot shall operate a remotely piloted aircraft system when icing conditions are observed, are reported to exist or are likely to be encountered along the route of flight unless the aircraft is equipped with de-icing or anti-icing equipment or the pilot has a means to detect icing.

(2) No pilot shall operate a remotely piloted aircraft system with frost, ice or snow adhering to any of the critical surfaces of the remotely piloted aircraft.

(3) For the purposes of subsection (2), critical surfaces means the wings, control surfaces, rotors, propellers, horizontal stabilizers, vertical stabilizers or any other stabilizing surfaces of the remotely piloted aircraft, as well as any other surfaces identified as critical surfaces in the operating manuals applicable to the system.