“I don't see a problem with FOs logging their sectors as ICUS, providing that they meet the requirements of CAR 5.40.”
This statement, IMHFO is missing the point. ICUS is exactly that, In Command (under supervision).There is more to command than simply poling (or providing AP input) on a particular sector.
Being in command is being responsible for the conduct of the entire flight, including subordinate crew.
Therefore the ICUS argument requires a complete structured environment, where the Supervisory (or whatever terminology may be used) Captain, has received appropriate training and certification in the role, i.e. early error detection, correction and communication to his trainee. The trainee is briefed preflight on what is expected, monitored, mentored, tested (orally) during the flight and then properly debriefed and the progress recorded.
Most FOs after several months line flying will or have reached a good standard of line flying, but can they adequately Command a flight?
P.S.Both Airlink and Pelair AOC authorise RPT, therefore, their regulatory minimas reference flight crew are the same as Rex