Not later than January 1, 2023, each retailer, as defined in section 21a-420, and hybrid retailer, as defined in section 21a-420, shall post a sign in a conspicuous place on the premises of such retailer or hybrid retailer notifying consumers that they may visit the Internet web site of the Department of Consumer Protection for information concerning the safe storage of cannabis and cannabis products and disposal of unused and expired cannabis and cannabis products.