West Coast
I was referring only to the testing of radio communications procedures and terminology.
A search on prune will give you a considerable collection of views on the IMC rating and its usefulness. Flying femmes answer reflected one end of a spectrum of views.
The actual requirements for IR and IMC ratings are laid out in the following web pages. I am sorry I don't know how to turn it into an actual link, that wasn't in the syllabus.
www.caa.co.uk/docs/175/Lasors_Section_E.pdf
Be interested in your comments when you have looked at it.
edit: magic, prune turned it into a link automatically