In the early days of .05 laws in Vic you could be detained after a preliminary positive roadside breath test, then would be taken off for a real blood alcohol count, from a sample taken by a doctor.
There were some strange issues that arose, like could the plod force a doctor to take blood from a vein (any vein) that the suspect had the right to nominate?
I only know this coz as a kid our summer holiday house was full of medicos enjoying a sip and the mirth of the permutations this rigmarole could (and did) cause.
DL

