Originally Posted by DFC
It is not the "minimum" service, it is the service provided full stop.
WRONG
To save you looking up the document (location however quoted in my original answer), here is the actual wording cut and pasted - relevant word italicised
Classification of Airspace
The classification of the airspace within a flight information region determines the flight rules which apply and the minimum services which are to be provided.
Like I said before - you have to be a Licence holder to know that, and how to use it, unlike some of the pseudo experts here who have never even seen the inside of an ATC facility.