Just cos their constitution says "no to drugs, bitchuz", does not mean they follow through. As far as I know, GPC has a no drug rule but never ever tests for it (happy to be corrected though).
I may be wrong but I'm pretty sure the same goes for CAPO, PTC, etc. I'm not criticising them for that, just pointing out that just because a fed says they are "WADA tested" means diddlysquat. I noticed that the ADFPF has a drug test results page with nothing on it. Ahem.
http://australiandrugfreepowerlifting.com.au/about-2/drug-control/drug-test-results/
Anyhoo, I'm happy to be corrected but as far as I know, the only Australian powerlifing fed that is regularly tested with random and targeted comp tests and the occasional out of comp test is PA.