Rep, the training and certificate you refer to is for the DAMP administrator. That is, someone who is able to form an opinion as to whether an individual may be affected by drugs or alcohol. The administrator is the one who has the authority to direct a person covered by their DAMP to undergo D&A testing. At least now the DAMP administrator training is able to be conducted online.
The taking of samples is a whole different kettle of fish. When we did the first courses with CASA last year, many of us thought that we would be the ones doing the testing. This was never intended to be the case. There would be huge ramifications from having positive samples taken by a person not appropriately trained and qualified.
Don't bother calling the CASA AOD line for advice. All you ever get on their number is an answering machine.