Conn. Agencies Regs. § 22a-255b-3
(a) Effective upon the date mandated by Section 22a-255b of the Connecticut General Statutes, any plastic bottle sold or offered for sale in Connecticut shall have imprinted or molded on its base a code number and acronym as identified in Section 22a-255b-2 of the Regulations of Connecticut State Agencies. The code number and acronym applied to any plastic bottle shall be subject to verification upon written request of the Commissioner and shall correctly identify the container material composition consistent with the definitions in Section 22a-255b-1 of the Regulations of Connecticut State Agencies with the following exceptions:
(Effective November 30, 1989)