N.Y. Comp. Codes R. & Regs. tit. 9 § 2520.7
In accordance with the provisions of the State Administrative Procedure Act, this Code shall be effective May 1, 1987, and all amendments to this Code shall become effective in accordance with the State Administrative Procedure Act or as otherwise required by law. Where implementation of a provision would require new or significantly revised filing procedures or notice requirements, the DHCR may postpone implementation of such provision, as required, for up to 210 days after the effective date of this Code, by an advisory opinion issued pursuant to section 2527.11 of this Title, which shall be available to the public on such effectivedate. Where such postponement is deemed necessary, current filing procedures, notice requirements, or forms, if any, may be utilized until revision thereof.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 2520.7