Anvaldra: I'd agree with you about 5 years ago, but not since. I believe Many operators still have the metric FL conversion tables in the books, yet RF is hapilly running on feet RVSM for quite some time.
I admit not having found your AIP Appendix 3 reference inside the document online. There used to be a conversion table in AIP but not any more. ICAO differences GEN 1.7? Nope.
Actually the old table had columns for "normative" and "SFT" / BA. You could hear exactly that on ATIS UUEE - in EN .MM measured by SFT; in RU - "normatyvnyj" 0,NN.