N.Y. Comp. Codes R. & Regs. tit. 4, § 202.3 – Time for filing of petitions.

(a) A petition for review may be filed within 30 days after an impartial agency designated by a local government pursuant to section 206.1 of the act has certified or decertified an employee organization, determined that no employee organization should be certified in an appropriate negotiating unit, or refused to decertify an employee organization.
(b) A petition for review which alleges that an impartial agency has not begun to process a petition expeditiously may be filed not less than 30 days after petitioner has filed a petition for certification or decertification with the impartial agency.