From Transport Canada’s AIM RAC, here:
https://www.tc.gc.ca/media/documents...18-1-E-RAC.pdf
8.10 CLASS G AIRSPACE—RECOMMENDED OPERATING PROCEDURES—EN-ROUTE
When aircraft are manoeuvring in the vicinity of uncontrolled aerodromes or cruising in Class G airspace, the lack of information on the movements of other aircraft operating in close proximity may occasion a potential hazard to all concerned. To alleviate this situation, all pilots are advised that:
(a) when operating in Class G airspace, they should continuously monitor frequency 126.7 MHz whenever practicable;
(b) position reports should be made over all NAVAIDs along the route of flight to the nearest station having air-ground communications capability. These reports should be made on frequency 126.7 MHz whenever practicable. If it is necessary to use another frequency to establish communications with the ground station, the report should also be broadcast on 126.7 MHz for information of other aircraft in the area. The report should contain present position, track, altitude, altimeter setting in use, next position and ETA;
(c) immediately before changing altitude, commencing an instrument approach or departing IFR, pilots should broadcast their intentions on 126.7 MHz whenever practicable. Such broadcasts should contain adequate information to enable other pilots to be fully aware of the position and intentions so that they can determine if there will be any conflict with their flight paths;
(d) at aerodromes where an MF has been designated, arriving pilots shall first broadcast their intentions on 126.7 MHz before changing to the MF. If conflicting IFR traffic becomes evident, this change should be delayed until the conflict is resolved. Pilots departing IFR should broadcast their intentions on 126.7 MHz, in addition to the MF, prior to takeoff; and
(e) the preceding reporting requirements are considered as the minimum necessary. Pilots are encouraged to make additional reports whenever the possibility of conflicting IFR traffic is suspected. An example would be reporting prior to overflying a facility where cross traffic is probable or where there is a published instrument approach procedure.
4.5 AIRCRAFT OPERATIONS— UNCONTROLLED AERODROMES
4.5.4 Mandatory Frequency
Transport Canada has designated a Mandatory Frequency (MF) for use at selected uncontrolled aerodromes, or aerodromes that are uncontrolled between certain hours. Aircraft operating within the area in which the MF is applicable (MF area), on the ground or in the air, shall be equipped with a functioning radio capable of maintaining two-way communication. Reporting procedures shall be followed, as specified in CARs 602.97 to 602.103 inclusive.
4.5.5 Aerodrome Traffic Frequency
An Aerodrome Traffic Frequency (ATF) is normally designated for active uncontrolled aerodromes that do not meet the criteria listed in RAC 4.6.4 for an MF. The ATF is established to ensure that all radio-equipped aircraft operating on the ground or within the area are listening on a common frequency and following common reporting procedures. The ATF will normally be the frequency of the UNICOM where one exists or 123.2 MHz where a UNICOM does not exist.
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In Canadian G, the closest equivalent to Australia’s ‘Area’ frequency is 126.7. 126.7 is - literally - the CTAF for aircraft operating in Canadian G
but there is a different frequency for use in the vicinity aerodromes in G. The Canadian equivalent of Australia’s ‘default CTAF’
for use in the vicinity aerodromes in G is 123.2.