Originally Posted by
Squawk7700
Refer to ops manual for passenger limits etc.
I did look for passenger limits in the ops manual, but only found seat limits. The most likely argument seems to be that CAO 20.16.3 doesn't apply to RAAUS, therefore section 13.2 which allows an infant to be carried on the lap does not apply and some other reg. that requires all passengers to occupy a seat and wear a seat belt/harness is the final word.
This whole idea of carrying a baby in your lap or having 2 children restrained by a single lap belt does seem to be very 1960s though (1950s maybe? Before my time anyway!)