N.Y. Comp. Codes R. & Regs. tit. 11, § 310.5
(a) A product or system group policy or certificate shall not be subject to Insurance Law, section 3425 or 3426. The following requirements shall apply in regard to cancellation, nonrenewal, or conditional renewal (as defined in subdivision [d] of this section) of coverage.
(4) Every notice of cancellation, nonrenewal, or conditional renewal shall contain the specific reason or reasons for cancellation, nonrenewal, or conditional renewal.
(c) Certificate.
(b) Product or system group policy.