N.Y. Comp. Codes R. & Regs. tit. 11, § 52.43
(a) The following rules shall apply with respect to experience data for individual insurance.
(1) Maintaining experience. Premium and loss data shall be recorded for each policy form and, where more than one coverage may be provided at the option of the insured under a single policy form, for each major combination of coverage and each age group (i.e., under age 65 and age 65 and over) on the following basis for each calendar year: Other than subparagraphs (vi) and (vii), the above terms are as defined in the current New York Instructions for Completion of the Life and Accident and Health Annual Statement. For policies issued on an attained age rating basis, or where benefits or premiums are changed at attained age 65, experience must be separately maintained for those under age 65 and age 65 and over. Experience, by age, need not be maintained for certain coverages, such as travel accident, with the prior consent of the superintendent.
(2) Combining experience. Experience under different policies where the coverage is substantially the same, and the premium rates are on a consistent basis, may be combined, but only with the prior consent of the superintendent.
(b) Standards for maintaining experience data for benefits under the Disability Benefits Law.
Premium and loss data shall be maintained yearly:
(1) separately for each of the following categories:
(2) for each of the following items:
(c) Additional standards for maintaining data concerning those insured by and the benefits paid by long term care insurance, nursing home insurance only, home care insurance only, or nursing home and home care insurance should be as follows:
(1) for each insured:
(2) for each claim: