Under the Aeronautics Act, it is illegal to operate a drone in controlled airspace such as that of YUL Montreal-Trudeau International Airport without the required certificates and authorizations.
Therefore, it is strictly forbidden to fly a drone on the territory of YUL Montreal-Trudeau International Airport without authorization from NAV Canada and without notifying Aéroports de Montréal. You may be subject to severe penalties, including fines or imprisonment, if you violate the law.
For any questions regarding the use of drones, please consult the Transport Canada website.