Elements of the offence
A person who drives, or attempts to drive, a motor vehicle while there is more than the 'prescribed concentration' of alcohol in the person's blood is guilty of the offence of exceed prescribed concentration of alcohol [Road Traffic Act 1961 (SA) s 47B].
Prescribed concentration of alcohol
The prescribed concentration of alcohol (PCA) for holders of an unconditional licence is 0.05 blood alcohol concentration (BCA). For unlicensed drivers or drivers of “prescribed vehicles”, the PCA is zero [Road Traffic Act 1961 (SA) s 47A].
Vehicles prescribed for this purpose include:
Penalties
For the penalties, see alcohol and drug penalties.
Learner, provisional and probationary drivers
Learner, provisional and probationary drivers also must drive with a zero blood alcohol concentration. However, it is only a breach of their conditions if they drive with a blood alcohol level greater than zero but less than 0.05. If they drive with a blood alcohol level greater than 0.05 they may be charged with both breaching their conditions and an offence of driving with the prescribed concentration of alcohol see driver's licences.