Thanks guys, I thought so but would like something concrete. The only thing I could find in LASORS is the following under MCC general information:
From F10.1
The course is intended to provide MCC training in two
circumstances:
(i) for students attending an ATP integrated course in
accordance with the aim of that course;
(ii) for PPL/IR or CPL/IR holders, who have not
graduated from an ATP integrated course but who
wish to obtain an initial type rating on a multi-pilot
aircraft.
The fact that it says that the course is intended makes me think that this guidance is not obligatory entry requirements and may be flexible.
ZW