N.Y. Banking Law § 239-a

§ 239-a. Preservation of books and records. Every savings bank shall\npreserve all its records of final entry, including cards used under the\ncard system and deposit tickets, for a period of at least six years from\nthe date of making the same or from the date of the last entry thereon;\nprovided, however, that preservation of photographic reproductions\nthereof or records in photographic form shall constitute compliance with\nthe requirements of this section. Notwithstanding the foregoing, the\nsuperintendent of financial services may prescribe by regulation such\nperiod of time longer or shorter than six years during which all records\nkept by saving banks as fiduciary shall be preserved in original form.\n