dp, thank you for the explanation from your perspective...
You're right, the IAA AIP doesn't include the decode, so reference to ICAO documents is necessary. Of course, ICAO refuses to publish online, and so reference (for practical purposes) elsewhere is necessary. This refusal to publish by ICAO is an international scandal. It's driven by a desire to generate revenue from the sale of publications and an unwillingness to move into the modern world of easy comunication.