The Rhode Island Medical Marijuana Act establishes laws regarding dispensaries and caregivers. Caregivers must be designated by the patient and have the responsibility for the medical marijuana needs of their patients. A caregiver may care for up to five (5) qualifying patients at a time. They are limited to up to twelve (12) plants and two and a half (2 ½) ounces per patients, but can grow no more than twenty four (24) plants and possess five (5) ounces of usable medical marijuana. Dispensaries are defined as Compassion Centers authorized to grow and provide registered qualifying patients with usable marijuana and related paraphernalia. These are state licensed operations that must register with Rhode Island. They may grow no more than 150 cannabis plants on the premises at one time. Only 99 of the 150 plants may be mature. Centers can possess no more than 1,500 ounces of usable cannabis at one time.