CD, your answer leaves me even more mystified, as you appear to have known the answer from the start? Anyroads, here is the relevant JAR-OPS section:
JAR-OPS 1.990. Number and composition of Cabin Crew. (See IEM OPS 1.990)
(a) An operator shall not operate an aeroplane with a maximum approved passenger seating configuration of more than 19, when carrying one or more passengers, unless at least one cabin crew member is included in the crew for the purpose of performing duties, specified in the Operations Manual, in the interests of the safety of passengers.
(b) When complying with sub-paragraph (a) above, an operator shall ensure that the minimum number of cabin crew is the greater of:
(1) One cabin crew member for every 50, or fraction of 50, passenger seats installed on the same deck of the aeroplane; or
(2) The number of cabin crew who actively participated in the aeroplane cabin during the relevant emergency evacuation demonstration, or who were assumed to have taken part in the relevant analysis, except that, if the maximum approved passenger seating configuration is less than the number evacuated during the demonstration by at least 50 seats, the number of cabin crew may be reduced by 1 for every whole multiple of 50 seats by which the maximum approved passenger seating configuration falls below the certificated maximum capacity.
(c) The Authority may under exceptional circumstances require an operator to include in the crew additional cabin crew members.
(d) In unforeseen circumstances the required minimum number of cabin crew may be reduced provided that:
(1) The number of passengers has been reduced in accordance with procedures specified in the Operations Manual; and
(2) A report is submitted to the Authority after completion of the flight.
Aditionally; many European carriers now operate on short haul with the Minimun Required Cabin Crew. This would have been unthinkable a few years back, but (no)thanks to the LOCOs' success in the market place, it has become SOP.
Also, there is a rumour floating about that some airlines are cinsidering training 2 different types of cabin crew for LH. Fully SEP qualified to make up the MinReqCC numbers, and service-only; trained to flesh out the rest for service purposes.
In countries where there is a legal requirement for a Cabin Crew licence, this will not be easy to implement.
The Netherlands does not have a Cabin Crew Licence. 