So the question is:
Is the IAA 900hr limit an annuual limit from April 1 to March 31, or is it a monthly maximum of 900hrs as per the UK CAA maximum:
"During the period of 12 months, expiring at the end of the previous month exceeds 900hrs"
If it is the later the Ryanair notice admits that it is guilty of breaching the 900hr limit.