In order to buy, use or possess retail marijuana in Colorado you have to be twenty-one years or older and have a valid ID (it does not have to be a Colorado ID).
Every dispensary requires you to sign a waiver when you sign in the first time you visit a shop saying you will not be reselling the product, you will not consume the products on the dispensary’s premises or in public, you will not be operating motor vehicles after consumption and you will not be using cell phones to photograph anything within the dispensary during your visit.