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On November 4, 2012, Amendment 64 passed in Colorado and Initiative 502 passed in Washington State to legalize the possession of small amounts of marijuana and marijuana-related products by adults. Possession by anyone younger than 21 years and the growing of marijuana without authorization remain illegal in both states. In Colorado, adults are permitted to possess up to 1 oz of marijuana or 6 marijuana plants. In Washington, adults are permitted to possess up to 1 oz of marijuana, 16 oz of marijuana-infused product in solid form, 72 oz of marijuana-infused product in liquid form, or any combination of all 3. The possession of marijuana remains illegal under federal law and marijuana remains a Schedule I agent under the Drug Enforcement Administration.
Hurley W, Mazor S. Anticipated Medical Effects on Children From Legalization of Marijuana in Colorado and Washington StateA Poison Center Perspective. JAMA Pediatr. 2013;167(7):602-603. doi:10.1001/jamapediatrics.2013.2273