So you're suggesting to operate a flight with reduced crew, we should remove the physical seats from the aircraft?
Ecam,
Yes, that is the rule in United Kingdom and a few other places I've lived/worked.
Many years ago we had a sick CC member, we thought the rule was bums on seats so we offloaded some pax and operated the flight home with reduced crew, thereafter we learned of our misinterpretation of the rules.