As quoted before this operation is expressly forbidden in the RFM.
An Operations Manual instruction cannot overrule it.
The RFM would require a Supplement. A Supplement might even require an STC as the RFM springs from the TC.
How many B3 operators here are aware of the MANDATORY requirement for 2 headsets and a functioning ICS?
Apparently the FAA doesn't if you read their MMEL.
Super F,
Poor analogy - Death rate in Germany per 100,000 inhabitants is approximately half your native country and they
drive twice your speed limit most of the time. Better roads, better cars, better drivers - different attitude.
The RFM prohibits you just the same in NZ as anywhere else. A while back this was raised by your CAA and had a few people scratching their heads.
Also as previously mentioned, the requirements vary across the 350 models.