Washington Initiative 502 was an initiative that was passed in 2012. It was presented to the Washington State Legislature after enough 241,153 signature were submitted. It was passed by a margin of 56 to 44 percent.
The initiative defined and legalized small amounts of marijuana-related products for adults, and also established taxes and defined the ways that revenue could be focused into healthcare, substance-abuse prevention and education. 21 was designated as the legal age for marijuana possession under state law.