"Medical Marijuana Act"; providing for the medicinal use of small amounts of marijuana by seriously ill patients with certain debilitating medical conditions under the supervision of a licensed medical doctor to mitigate the symptoms or effects of the condition without fear of patient or doctor civil or criminal prosecution; exempting the medical use and professional opinions relating to the medical use of marijuana from criminal and civil penalties; specifying certain marijuana possession, delivery or production limits, providing for an affirmative defense to charges of possessing, delivering or producing quantities is excess of the limits; providing for the identification of mature marijuana plants for medical use purposes; legal protection to extend to primary caregivers of the patients under certain conditions; providing for physician testimony in legal proceedings; protecting property seized in connection with the claimed medical use of marijuana, prohibiting prosecution for being in the presence or vicinity of the medical use of marijuana and establishing an affirmative defense to a charge of violation; restricting the medical use of marijuana by minors; imposing penalties for fraudulent representation of the medical use of marijuana and specifying certain additional use restrictions; severability clause (mk)