I totally agree that the language used by the OP has been imprecise at best. As others have stated, the RFM will provide the appropriate limitations that have to be followed - end of debate. Post #22 above seems to indicate that this is a non-issue. If you are CAT-A training then you can use the Training switch.
On top of that comes the "risk management" element that every single trainer should be aware of, so limit flight in simuated OEI to those times absolutely required in order to comply with the flight check schedule (PC or OPC).
Finally, if conducting checks in EASA land or UK you are required to use a simulator if one is "available". As far as I know there are a number of available simulators
