As for JAR OPs, well, nobody is very clued up on it, especially when they contradict themselves so much, as paragraph .943 proves. I meant to put the decimal point before the 9 in my previous reference, because the same paragaph is relevant in JAR OPS 1 and 3.
I say again, having finished with multi-crew, the CAA are now turning their attention to single crew, hence the last conference in Gatport Airwick about mandating it. The original intent was to have it all formalised around October last year, but that seems to have slipped a bit
Phil