Any person served with a PAR as provided in section 2529.4(b) of this Part, may, within 20 days from the date of mailing of a copy of the PAR by the DHCR pursuant to section 2529.4(b) of this Part, file a verified or affirmed answer thereto, by filing the same with the DHCR. A copy of such answer to the PAR shall be served by the DHCR upon the adverse party. The commissioner may, in his discretion, and for good cause shown, extend the time within which to answer.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 2529.5