At one time I remember reading a law-enforcement profile of how drivers under the effects of various drugs would tend to drive. There were profiles of alcohol, marijuana, speed, etc.. The purpose was to be able to justify a traffic stop based on observing the relevant behaviors.
The profile for a driver under the effects of marijuana was "Obeys all traffic laws." Thought it was funny at the time.
As to the relevance of the new amendment and golf.........I'll have to wait and see on that one. Perhaps local rules that you get a free mulligan after taking a puff?