Proposition 64: The Adult Use of MarijuanaEffective November 9, 2016, Proposition 64 legalizes specified personal use and cultivation of marijuana for adults 21 years of age or older; reduces criminal penalties for specified marijuana-related offenses for adults and juveniles; and authorizes resentencing or dismissal and sealing of prior, eligible marijuana-related convictions. The proposition includes provisions on regulation, licensing, and taxation of legalized use.