Except as herein otherwise provided, the Controlled Substances Therapeutic Research Program shall be limited to cancer chemotherapy patients and glaucoma patients, who are certified to the review committee by an authorized practitioner as being in such medical condition necessary for the treatment of glaucoma, or the side effects of chemotherapy in cancer patients; such authorization shall be upon such terms and conditions as may be consistent with the public health and safety. To the extent of the applicable authorization, persons are exempt from prosecution in this state for possession, production, manufacture, or delivery of cannabis.