I absolutely take your point, Rivet. Except for the bit that:
I suspect the reason for the change is to allow the national CAAs some flexibility in determining precicely under what circumstances differences training is required, or when just familiarisation training will suffice
With new technology being introduced all the time, surely it would make more sense to
centralise the requirements for differences training? For example, rather than every single JAR state individually requiring differences training when converting from (to use one of your examples) a deisel to a conventional spark-ignition engine, wouldn't it make sense for JAR to continue to dicate the training required centrally, and then each member state's legislation to simply defer this to JAR? After all, member states have always had the ability to override JAR when they need to in any case.
If you are right, though, I would expect to find details on what requires differences training in the ANO. There was nothing in there the last time I looked, but that was before it was removed from JAR, so I shall download the latest version of the ANO and check there....
FFF
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