If an infraction notice is issued on the basis that AOD-9604 falls under section S0 of the anti-doping code, then AOD-9604 would definitely be a Specified Substance, because all S0 substances are Specified Substances.
From the AFL anti-doping code:
All Prohibited Substances shall be considered as “Specified Substances” except Substances
in classes S1, S2.1 to S2.5, S.4.4 and S6.a, and Prohibited Methods M1, M2 and M3.
Put another way, there's no immediate stand-down for AOD-9604, unless it's considered to fall under one of those classes listed above (which no-one from ASADA, WADA or the AFL has publicly suggested as yet AFAIK).