SUMMARY: Fifty-four percent of voters approved Amendment 20 on November 7, 2000, which amends the state’s constitution to recognize the medical use of marijuana. The law took effect on June 1, 2001. It removes state-level criminal penalties on the use, possession and cultivation of marijuana by patients who possess written documentation from their physician affirming that he or she suffers from a debilitating condition and advising that they "might benefit from the medical use of marijuana." (Patients must possess this documentation prior to an arrest.) Patients diagnosed with the following illnesses are afforded legal protection under this act: cachexia; cancer; chronic pain; chronic nervous system disorders; epilepsy and other disorders characterized by seizures; glaucoma; HIV or AIDS; multiple sclerosis and other disorders characterized by muscle spasticity; and nausea. Other conditions are subject to approval by the Colorado Board of Health. Patients (or their primary caregivers) may legally possess no more than two ounces of usable marijuana, and may cultivate no more than six marijuana plants. The law establishes a confidential state-run patient registry that issues identification cards to qualifying patients. Patients who do not join the registry or possess greater amounts of marijuana than allowed by law may argue the "affirmative defense of medical necessity" if they are arrested on marijuana charges. 

MEDICAL MARIJUANA STATUTES: C.O. Const. art XVIII, § 14 (2001); §0-4-287 art. XVIII, Colo. Rev. Stat. § 18-18-406.3 (2001) (interpreting the provisions of the ballot initiative and constitutional amendment), Colo. Rev. Stat. § 25-1.5-106 (2003) (originally enacted as § 25-1-107(1)(jj) (2001))(describing the powers and duties of the Colorado Department of Public Health)

CONTACT INFORMATION: Application information for the Colorado medical marijuana registry is available online or by writing:

Colorado Department of Public Health and Environment
HSVR-ADM2-A1
4300 Cherry Creek Drive South
Denver, CO 80246-1530
Phone: 303-692-2184
http://www.cdphe.state.co.us/hs/medicalmarijuana/fullpacket.pdf