The stoners have spoken: Recreational marijuana is now legal in eight states and Washington, DC. Thanks to the passage of Proposition 64, California is one of them, making it the country's largest cannabis market—the state will start issuing sales licenses by January 1, 2018. Now, as long as the Trump administration doesn't confiscate our stash, regulators, lawyers, and scientists have some big hazy questions to navigate, from how to keep digital tabs on up to 25,000 licensed growers to how to evaluate THC-­related DUIs. Here's a road map California and future pot-friendly states will follow as they roll toward regulation.

1. Cultivation

Backwoods farms go legit.

An estimated 50,000 marijuana growers supply California's black market. That's nearly six times the number of wineries in the whole country. Prop 64 lets these cultivators apply for a license, even if they have pot convictions.

Every plant will be ID'd.

How do you keep legal Humboldt Kush from ending up in North Dakota? Growers in California will be required to tag each plant and enter it into a state-operated inventory system, the largest of its kind.