N.Y. Comp. Codes R. & Regs. tit. 18, § 406.1 – Maintenance of records.

(a) The social services district shall maintain all records necessary for proper and efficient operation of the social services program. This includes records regarding application, determination of eligibility, authorization and provision of social services, administrative costs, and such statistical, fiscal and other records as are necessary for reporting and accountability.
(b) The social services district shall retain such records for an appropriate period of time.