CHAPTER IV INSTRUMENT FLIGHT RULES
Article 70
Aircraft operated as an IFR flight shall be equipped with suitable instruments and navigation equipment appropriate to the route to be flown.
Article 71
Except when necessary for take-off or landing, or except when specifically authorized by the CAA, an IFR flight shall be flown at a level which is not below the minimum flight altitude, or, where no such minimum flight altitude has been established:
1. over high terrain or in mountainous areas, at a level which is at least 2000 ft above the highest obstacle located within 5 miles of the estimated position of the aircraft;
2. elsewhere than as specified in Subsection 1, at a level which is at least 1000 ft above the highest obstacle located within 5 miles of the estimated position of the aircraft.
Article 72
Unless otherwise prescribed by the appropriate authority, an aircraft electing to change the conduct of its flight from compliance with the IFR to compliance with the visual flight rules shall, if a flight plan was submitted, notify the appropriate air traffic control unit specifically that the IFR flight is cancelled and communicate thereto the changes to be made to its current flight plan.
When an aircraft operating under the IFR is flown in or encounters visual meteorological conditions it shall not cancel its IFR flight unless it is anticipated, and intended, that the flight will be continued for a reasonable period of time in uninterrupted visual meteorological conditions.
Article 73
IFR flights shall comply with the provisions of Article 40 to 50 when operated in controlled airspace.
Article 74
Except when necessary for take-off or landing, or except when specifically authorized by the CAA, IFR flights operated within controlled airspace shall select flight levels or altitudes as specified in the Table II, and authorized by air traffic control clearances.
Article 75
An IFR flight operating outside controlled airspace at a level which is at least 4000 ft above mean sea level shall be flown at a cruising level appropriate to its track as specified in Table II of IFR tables of cruising level.
Article 76
An IFR flight operating outside controlled airspace but within or into areas, or along routes, designated by the appropriate ATS authority shall maintain an air-ground voice communication watch on the appropriate communication channel and establish two-way communication, as necessary, with the air traffic services unit providing flight information service.
Article 77
An IFR flight operating outside controlled airspace shall submit a flight plan as specified in Article 30, report position as specified in Article 47 and shall maintain an air-ground voice communication watch on the appropriate ATS unit communication channel and establish two-way communication.