Vt. Stat. tit. 8 § 4587
A medical service corporation that has received a permit from the Commissioner of Financial Regulation under section 4584 of this title shall not thereafter issue a contract to a subscriber or charge a rate that is different from copies of the contracts and rates originally filed with and approved by the Commissioner at the time the permit was issued to the medical service corporation, until the medical service corporation has filed copies of its proposed contracts and rates and they have been approved by the Commissioner or the Green Mountain Care Board established in 18 V.S.A. chapter 220, as appropriate. Prior to approval, there shall be a public comment period pursuant to section 4062 of this title. Each such filing of a contract or the rate therefor shall be accompanied by payment to the Commissioner or the Board, as appropriate, of a nonrefundable fee of $150.00. A medical service corporation shall file a plain language summary of rate increases pursuant to section 4062 of this title.
8 V.S.A. § 4587