benhurr
Those are RECOMMENDED MDAs etc. Usually "IR plus 200 feet" with an absolute minimum of 500 feet for a precision aid and 600 feet for non-precision.
But that's not LAW. Or wasn't last time I checked. The IMC-rated pilot can technically use the IR minima. I suspect the CAA would use the "endangering an aircraft" argument if he screwed up and they wanted to prosecute.