§  42.5   Preparation and preservation of reproductions of original records.

   (a) Each carrier may use a retention medium of its choice to preserve
   records in lieu of original records, provided that they observe the
   requirements of paragraphs (b) and (c) of this section.

   (b) A paper or microfilm record need not be created to satisfy the
   requirements of this part if the record is initially prepared in
   machine-readable medium such as punched cards, magnetic tapes, and
   disks. Each record kept in a machine-readable medium shall be
   accompanied by a statement clearly indicating the type of data included
   in the record and certifying that the information contained in it has
   been accurately duplicated. This statement shall be executed by a
   person duplicating the records. The records shall be indexed and
   retained in such a manner that they are easily accessible, and the
   carrier shall have the facilities available to locate, identify and
   reproduce the records in readable form without loss of clarity.

   (c) Records may be retained on microfilm provided they meet the
   requirements of the Federal Business Records Act (28 U.S.C. 1732).