2010 New York Code
BNK - Banking
Article 6 - (229 - 260-B) SAVINGS BANKS
239-A - Preservation of books and records.

§  239-a.  Preservation of books and records. Every savings bank 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 saving banks as
  fiduciary shall be preserved in original form.