Vermont Caregiver’s Medical Marijuana Card Should a patient be under 18 years-old or if a patient needs assistance in obtaining and using medical cannabis. Registered caregiver is a person who has agreed to undertake responsibility for managing the well-being of a registered patient with respect to the use of marijuana for symptom relief. The registered caregiver can never have been convicted of a drug-related crime. The caregiver must be 21 years of age or older. Patients may only have one registered caregiver at a time. Registered caregiver may serve only one registered patient at a time.