Windy,
The IOM publish their rules and regs on their web site. Everything can be downloaded. If operators don't know how to read plain ICAO English they have only themselves to blame.
Every operator irrespective of which flag they fly on needs to keep abreast of the regs as they change. IOM make them easy to read, and easy to find.
You cannot say that about EASA as is evidenced by 28 countries not being on the same page when it comes to a COMMON set of rules!
What do your "unhappy" operators expect? Personalised letters to each absolving them all from their regulatory responsibilities?