Commercial operators will have a Compliance Statement, which will direct the pilot to the Operations Manual, which will spell out in words that any ten year old should be able to understand (ie written for CASA to 'accept'). Most will be more restrictive than the regulation (= management arse covering). By whatever CAR (can't be bothered looking it up), the OM becomes the over ruling document, so any pilot in breach of that would be liable for prosecution anyway. Could be that it is 12 hours and 0% bac at sign on, which could mean being on the wagon 6 days a week.
But if the allegations against this goose in the bugsmasher are true, whether he was impaired by alcohol or merely a retard, is moot. At the very least he should have to pay for his rescue. Suspending whatever certificate he has won't be much of a deterrent because people like that probably drive unregistered, uninsured and unlicensed anyway.