This law allows smoking in a private home or a business that is licensed for on-site marijuana consumption. You cannot drive while under the influence of marijuana, this is considered to be a DUI if caught. Marijuana users can’t smoke marijuana in places that tobacco is prohibited as well as many public places. Under this law users can possess up to 28.5 grams of marijuana and 8 grams of concentrated marijuana. An individual is permitted to grow up to six plants within a private home as long as the area is locked and not visible from a public place (California General Election, Official Voter Information