N.Y. Comp. Codes R. & Regs. tit. 10 § 66-1.6
The certificate of immunization required in section 66-1.3(a) of this Subpart shall be prepared and signed by a health practitioner licensed in New York State and shall specify the products administered and the dates of administration. It may also show physician, nurse practitioner, or physician assistant-verified history of varicella disease and/or positive serologic tests for measles, mumps, rubella, varicella, and/or Hepatitis B and/or laboratory confirmation of disease for measles, mumps, rubella and/or varicella. Certificates of immunization issued prior to September 1, 2019 may also show positive serologic tests for all 3 serotypes of poliomyelitis contained in the polio vaccines. A record issued by NYSIIS, the CIR, an official immunization registry from another state, an electronic health record, and/or an official record from a foreign nation may be accepted as a certificate of immunization without a health practitioner's signature.
N.Y. Comp. Codes R. & Regs. Tit. 10 § 66-1.6