They could vote to ease punishment for past offenders, but that would be an exception and not the rule. In general people are beholden to the law at the time th

They could vote to ease punishment for past offenders, but that would be an exception and not the rule. In general people are beholden to the law at the time they're caught breaking it. I got a speeding ticket, and a few months later the speed was changed to match the speed I had been doing. I still was guilty of breaking the law at the moment I was stopped. So they could put in an exception for past users, but the law defaults to what the books said at the time you committed the crime. If that wasn't the case, people could be convicted of crimes that were not illegal at the time they committed them.