N.Y. Comp. Codes R. & Regs. tit. 1, § 43.4
Any milk producer, including a cooperative corporation or association of producers, who does not receive payment for milk from a milk dealer within the time prescribed in section 258-b(2)(a) of the law shall notify the commissioner of such fact, verbally or in writing, within five days of the date on which payment was due from the milk dealer.