On or after July 1, 1991, no person may distribute, sell or offer for sale any plastic bottle or rigid plastic container without a molded, imprinted or raised label indicating the type of plastic resin used to produce the plastic bottle or rigid plastic container.
Coding of plastic containers
32 M.R.S. § 1722, under CODING OF PLASTIC CONTAINERS.
32 M.R.S. § 1722