B. Use of rates higher than prima facie rates. An insurer may file for approval of and use rates that are higher than the prima facie rates set forth in § 38.2-3726 or published as set forth in § 38.2-3727, to the extent adjusted by § 38.2-3730. In order to use these higher rates, it shall be demonstrated to the satisfaction of the Commission that the use of such higher rates will result in a ratio of claims incurred to premiums earned (assuming the use of such higher rates) that is not less than the loss ratios as required by § 38.2-3725D and E for those accounts to which such higher rates apply and that such upward deviations will not result on a statewide basis for that insurer of a ratio of claims incurred to premiums earned of less than the expected loss ratio underlying the current prima facie rate developed or adjusted pursuant to § 38.2-3730. Deviations effective for 1993 and 1994 for credit life insurance shall be derived based upon a fifty percent loss ratio. If rates higher than the prima facie rates provided for in §§ 38.2-3726 and 38.2-3727, to the extent adjusted pursuant to § 38.2-3730, are filed for approval, the filing shall specify the account or accounts to which such rates apply. Such rates may be applied on an equitable basis approved by the Commission to only one or more accounts specified by the insurer for which the experience has been less favorable than expected.