“It’s kind of shocking in a way that the states that approved it have not had more oversight and consumer information,” said Dr. Jerome Groopman of Harvard Medical School, who favors legalization. “The horse is out of the barn, so to speak, and there’s a responsibility to consumers and particularly young people. THC is a serious substance. It has increased by 5 to 15 times in today’s plants compared to the 1960s. It’s a long time since Upton Sinclair. Now consumers have to know: Is it pure? What is the concentration? What are the hazards?”

On Wednesday, the state task force met to forge a rule denoting 10 milligrams as a serving, so that the dosage is clearly demarcated. And on Friday, Gov. John Hickenlooper signed legislation proposing a banking solution for the mainly cash pot business, but the Federal Reserve will need to sign off on it.

Because the Colorado law was approved by referendum, it’s like a Wild West statute, where things are getting filled in underneath, with a haphazard application of the regulatory process.

“One major reason I got involved in the movement was so that consumers could have basic access to information about the products they’re consuming, which was totally impossible under the prohibition that created the black market,” said Tom Angell, the founder and chairman of Marijuana Majority. “So it’s particularly disappointing to see that some companies in the legal marijuana industry — which our years of advocacy allowed to exist — are falling short of those principles. It seems basic labeling and consumer information hasn’t been a chief priority, but hopefully now it’s starting to change.”

He wants budtenders behind the counter to be trained so they can give customized guidance to customers of varying tolerance levels.

As the black market comes into the light, the hang-loose community can be uptight about any moves to regulate or put contours around the sale of pot to better protect neophytes, teenagers and children. Perhaps because they have spent so much time fighting to move past the old “Reefer Madness” caricature, the reefer crowd gets mad at the suggestion of any regulation, no matter how small or helpful. The clubby community that long existed in the shadows can have a countercultural reaction to rules.

Also, as one Colorado political aide pointed out: “There’s so much money involved. This is a group of people who probably never thought about money, and now a lot of people just have dollar signs in their eyes.”

Laughing, he noted, “The weirdest thing in the world is to hear from an angry pothead who finishes a tirade about rules with ‘dude.’ ”