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N.Y. C.P.L.R. 401
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Rule 401 Parties
Article 4: Special Proceedings
Rule Text
§ 401. Parties. The party commencing a special proceeding shall be styled the petitioner and any adverse party the respondent. After a proceeding is commenced, no party shall be joined or interpleaded and no third-party practice or intervention shall be allowed, except by leave of court.