The Argus reported; Colorado made driving under the influence of pot illegal (Rolling Stoned, Mar. 2, 2016), before commercial sale took place. That was in May 2013, however, Amendment 64, which ended cannabis (marijuana) prohibition went into effect on Dec. 10, 2012.
Ending the discredited prohibition of cannabis, the act of caging responsible, innocent adults who use cannabis should not be dependent on whether or not police and their unions have tools to enforce driving laws. Rather it’s the other way around; re-legalize the relatively safe, extremely popular God-given plant and then figure out how to live with it.
A sane or moral argument to punish innocent citizens doesn’t exist.