Separate the common expenses in proportion to the total of all common expense separations determined in Sec. Sec. 1242.83 and 1242.84 above.
Note: If compilation of the data in compliance with any of the above separation rules results in an undue burden in accounting expense, the carrier may request relief from such rules by letter to the Director, Bureau of Accounts. If reliable data can be developed through other methods and procedures, the carrier may request substitution of such methods also by letter to the Director, Bureau of Accounts. In both cases, the carrier shall support the request with full details.