I. Every advisory organization and every insurer shall, within a reasonable time after receiving written request therefor and upon payment of such reasonable charge as it may make, furnish to any insured affected by a rate made by the insurer, or to the authorized representative of the insured, all pertinent information as to such rate. If the advisory organization or insurer fails to grant or reject such request within 30 days after it is made, the applicant or insurer may request a hearing from the department pursuant to RSA 400-A:17.
II. If, after a hearing held under this section, it is determined that the rates charged by an insurer are in excess of the otherwise appropriate rate, such overcharge shall be refunded to the insured.