The 1906 Pure Food and Drug Act required that ingredients be listed on the label. In 1962 this requirement was expanded to include both safety and efficacy. Marijuana is assigned by statute to Schedule I, the most restrictive of the categories. I if it has a high potential for abuse, has no currently accepted medical use in treatment in the United States, and there is a lack of accepted safety for the use of the drug under medical supervision. The CSA allows the U.S. attorney general to reschedule a drug if he or she finds that it does not meet the criteria for the schedule to which it has been assigned.
Federal law preempts state and local laws in regulating controlled substances.
However, states may regulate in this area if they do not conflict with the federal statutes. California Marijuana Laws Possession of marijuana is punishable as a misdemeanor or felony, depending on the amount possessed. Cultivation of marijuana is punishable by state imprisonment for at least 16 months. Transportation, importation, selling, furnishing, administering, or giving away marijuana is punishable by imprisonment in state prison for two, three or four years. The debate over the medicinal use of marijuana has been around for many years.