Conn. Gen. Stat. § 31-286
Any employer who has complied with the provisions of section 31-285 by entering into an agreement with his employees to provide a system of compensation, benefit and insurance in lieu of the compensation and insurance provided by this chapter, which agreement has been approved by the Insurance Commissioner, or any employer who has complied with the provisions of section 31-284 by filing with the Insurance Commissioner security guaranteeing the performance of his obligation under this chapter or by insuring his full liability or by a combination of the two last-named methods approved by the Insurance Commissioner, may file, in the office of the administrative law judge who may have jurisdiction in case of injury, a certificate of the Insurance Commissioner stating that such substitute system has been approved or that such security guaranteeing the performance of the obligations of this chapter has been filed with and accepted by the Insurance Commissioner or that a combination of the methods stated in section 31-284 has been approved. Any employer who has insured his full liability may file a certificate, in the manner prescribed in section 31-348, setting forth such fact and stating the date of expiration of such insurance, which certificate shall thereupon become a part of the records of the office of such administrative law judge.
Conn. Gen. Stat. § 31-286
(1949 Rev., S. 7462; 1958 Rev., S. 31-182; 1961, P.A. 491, S. 42; P.A. 77-614, S. 163, 610; P.A. 80-482, S. 204, 348.)