You're usually all for the "black text" of the rules, show me, EXACTLY, what part of S2 specifically addresses AOD9604.
I'm not sure why you keep asking this question.
S2 has a catch-all provision and arguably, AOD is caught by it.
In the interests of natural justice and due process, ASADA must issue an ADRV pursuant to the correct section to allow a player to mount a defence against the charge.
If ASADA choose S0, and if it remains open that S2 might be applicable, then that player will easily defend a charge against S0 because S0 can only be applicable if no other section is applicable.
If ASADA choose S2, then the player will mount a completely different defence.
So it is very, very important which section ASADA chooses, because the player's defence will be mounted accordingly, and they will be different defences depending on which section is used.
Let us not forget, the appeal against the ADRV will go to the AAT (and higher courts if necessary), and the AAT will take an interest in whether a public body is doing the right thing and using the correct provisions.