N.Y. Comp. Codes R. & Regs. tit. 14, § 635-12.7
(a) This section applies only to preexisting services.
(3) Prior to the payment start date, each individual receiving preexisting services must:
(5) Unless the fee is waived by the provider, if the individual does not obtain full Medicaid coverage by the payment start date, or if the individual loses full Medicaid coverage on or after the payment start date, the individual and/or liable parties must either:
(b) Responsibility to provide information.