This law legalizes the possession of marijuana for adults age 21 and older. The only marijuana that would be legal to sell in this state would be grown by specially-licensed Washington farmers and sold in standalone, marijuana-only stores operated by private Washington businesses licensed and regulated by the state. There would be a 25% sales tax, with 40% of the new revenues going to the state general fund and local budgets, and the remainder dedicated to substance-abuse prevention, research, education and health care. Advertising would be restricted. A new marijuana DUI standard that operates like the alcohol DUI standard would be established.