CAR 401.62
...... no holder of a class 4 flight instructor rating -aeroplane.....shall exercise the privileges accorded by that rating unless the holder
a) is conducting training in accordance with a flight training unit operator certificate and
b) is under the supervision of a supervising instructor of the flight training unit
As was noted in a post above only pilots exercising the privileges of their instructor rating can do the instruction required for a recency qualifying flight. therefore a Class 4 instructor doing this must be under supervision and working for an FTU