Sorry Straitman.
I was not monitoring this thread, so I didn't see your posting.
Thanks 212 Man, that is one part of it.
To throw more confusion into the equation one must read backwards to the conclusion??
CAR 5.121 (1) (b) and (c). Basically this states: A CHPL is not permitted to be PIC in a Multi Pilot Helicopter in Charter and RPT.
But can be the Co-Pilot.
[I appreciate that ESSO claims to be a private operation] [A Collins Street Lawyer will be best to say if HA Pilots are employee's of Mobil Exxon, if they are employed and paid by a third party, eg HA, then this Flight when the HA pilot is the Flying Pilot or ICUS, may well be Charter, hence Car 5.121(1) (b) applies, hence ICUS is not possible with a CHPL].
Offshore Helicopters are Multi-Pilot aircraft, by requirement, and some by certification.
As 212 Man said, the same can be said for the CIR. The Captain or ICUS Pilot must hold a CIR if the aircraft is planned under the IFR. CAR 5.40 (c).
I will research the maximum passenger aspects when I have had some sleep. However this requirement basically superseded the old CHPL / ATPL MTOW limit of 5700Kg.