§  42.7   Retention of other records.

   Except as specified in § 42.6, each carrier shall retain records
   identified in its master index of records for the period established
   therein. Records relevant to complaint proceedings not already
   contained in the index of records should be added to the index as soon
   as a complaint is filed and retained until final disposition of the
   complaint. Records a carrier is directed to retain as the result of a
   proceeding or inquiry by the Commission to the extent not already
   contained in the index will also be added to the index and retained
   until final disposition of the proceeding or inquiry.

Specific Instructions for Carriers Offering Interexchange Services