UK019, for many years I was under the mistaken impression that UK CAA FOIs were using the Big UK CAA Book on How To Fly Your Airbus/Boeing when they laid down the law to their particular airlines.
Then I was told it all depended on what had frightened them at some stage in their line careers and there was no master reference work, even though what they were saying, on occasions, countermanded the manufacturers manual on "how to do it".
Somewhere around this time I departed for my current location..................