N.Y. Comp. Codes R. & Regs. tit. 13, § 11.9
(a) All of the following books and records must be maintained and preserved in an easily accessible place for a period of not less than five years from last transaction or publication, the first two years in an appropriate office of the investment adviser. Before ceasing operations, the investment adviser must arrange for maintenance and preservation and be responsible for all books and records for the full period described above:
(13) client file should contain:
(14) investment advisers with custody or possession of securities or funds of any client must additionally keep the following records:
(15) investment advisers who render investment supervisory or management service must keep the following records (with respect to the portfolio):