Proposition 64, The Adult Use Marijuana Act, which permits adults who are not participating in the state's medical cannabis program to legally grow (up to six plants, including all of the harvest from those plants) and to possess personal use quantities of cannabis (up to one ounce of flower and/or up to eight grams of concentrates) while also licensing commercial cannabis production and retail sales. (Medical cannabis patients are not subject to these limits.) The measure prohibits localities from taking actions to infringe upon adults' ability to possess and cultivate cannabis for non-commercial purposes. The initiative does not "repeal, affect, restrict, or preempt ... laws pertaining to the Compassionate Use Act of 1996." Several other marijuana-related activities not legalized by the measure are reduced from felonies to misdemeanors. The law also provides for resentencing consideration for those found guilty of prior marijuana convictions.The revised marijuana penalties took effect on November 9, 2016. Retail sales of marijuana by state-licensed establishments are scheduled to begin under the law on January 1, 2018. On site consumption is permitted under the law in establishments licensed for such activity