Legalization of Recreational Marijuana; Exempts certain activities involving marijuana from use & possession offenses; authorizes persons age 21 & over to engage in certain activities; provides for personal cultivation; specifies possession limits; specifies duties of Division of Alcoholic Beverages, Marijuana, & Tobacco; provides for licensing and regulation of growers, retailers, and others; authorizes establishment of restricted cannabis zones; provides requirements for such zones; provides for sentencing review for certain offenders; authorizes individual convicted of certain crimes to obtain sealing or expunction of his or her criminal history record.