Smoking marijuana recreationally is now legal in California. However, before you take your stash with you as you head out the door, take caution. Changes to marijuana legislature is happening on a state level, not a federal level. When it comes to which laws carry more weight, federal trumps state. California voters passed Proposition 64, also known as the Adult Use of Marijuana Act, to begin the process of governing the drug on Nov. 9, 2016.