Section 128. Preservation of books and records

Every bank and every trust
  company shall preserve all its records of final entry,  including  cards
  used under the card system and deposit tickets, for a period of at least
  six  years from the date of making the same or from the date of the last
  entry thereon; provided,  however,  that  preservation  of  photographic
  reproductions  thereof  or records in photographic form shall constitute
  compliance with the requirements of this  section.  Notwithstanding  the
  foregoing,  the banking board may prescribe by regulation such period of
  time longer or shorter than six years during which all records  kept  by
  banks  and  trust  companies as fiduciary shall be preserved in original
  form.