MO SB951

Legalizes medical marijuana for qualified patients with debilitating medical conditions (cancer, glaucoma, HIV/AIDS, Alzheimer's, chronic pain, severe nausea, seizures, and other serious conditions approved by physicians)

Establishes registry identification card system administered by the Department of Health and Senior Services; qualified patients must have written physician certification and can possess up to 3 mature plants, 4 immature plants, and 4 ounces of usable marijuana

Creates "medical marijuana centers" as registered businesses that can legally cultivate and sell medical marijuana to cardholders; prohibits employment of persons with felony drug convictions

Imposes 8 percent sales tax on medical marijuana sales (compared to 4 percent standard rate); exempts medical marijuana from existing medical device/pharmaceutical exemptions

Requires voter approval via referendum on the first Tuesday after the first Monday in November 2014; modifies Schedule III controlled substances to reclassify marijuana from Schedule I to Schedule III for medical use purposes