Under Article XIV, an approved Patient ID card holder, or a Caregiver ID card holder on behalf of a licensed patient, may purchase up to 6 ounces of dried, processed marijuana or its equivalent within a 30-day period, unless a physician or nurse practitioner certifies the patient for a greater amount. A patient ID card holder, or caregiver ID card holder on behalf of a licensed patient, may be in possession of up to a 60-day supply (12 ounces, unless the patient has a physician or nurse practitioner certification authorizing more than 6 ounces in 30 days).