Before strict liability with road rules in NSW, the police had to have reasonable excuse to assume intoxication to justify a breath test. Driving erratically for example. Random breath tests, like DAMP checks are fishing expeditions. A Rex/ Jetstar/ Virgin passenger CAN be airside on the tarmac at Sydney whilst legally intoxicated. The pilot has no valid reason to remove him/her but CAsA can? (NOTE: legally intoxicated, not blind drunk).
It would be less costly and more safe if the Regulatory Review Program were to tell us what "IS" permitted rather than what's "NOT" permitted because it appears "EVERYTHING" is illegal.