I have been watching this on the CASA website for a while..it will have HUGE implications.
A false positive causes a crew to be a person down one hour before departure...ops now need to cover the spot at short notice.
A couple of false positives happen and bingo no one goes to work whilst taking paracetamol anymore...there will be a huge rise in sick leave taken.
After I sign off and walk through the hangar can I refuse a test? What about dead heading in uniform?
My prediction... a massive change in 12 months to make it workable.