N.J. Stat. Ann. § 17B:27A-16.5

5. A domestic mutual insurer which has converted from a health service corporation pursuant to the provisions of sections 2 through 4 of P.L.1995, c.196 (C.17:48E-46 through C.17:48E-48) shall not renew individual hospital or medical insurance policies or health service contracts originally issued prior to November 30, 1992, until it has made an informational filing with the commissioner. The rates shall be formulated so that the anticipated minimum loss ratio for such policy or contract form shall not be less than 80% of the premium. Such domestic mutual insurer shall submit with its rate filing supporting data and a certification that the insurer is in compliance with the anticipated loss ratio requirement. The content and form of the supporting data and certification required pursuant to subsection e. of section 8 of P.L.1992, c.161 (C.17B:27A-9) shall satisfy the requirements of this section. Any other insurer may irrevocably elect to become subject to the provisions of this section by written notice to the commissioner in a format specified by the commissioner.