Section 21(1) in The Appellate Tribunal for Petroleum and Natural Gas (Procedure, Form, Fee and Record of Proceedings) Rules, 2009
(1)Every appeal, petition, caveat, interlocutory application and documents shall be presented in triplicate by the appellant or petitioner or applicant or respondent, as the case may be, in person or by his duly authorized agent or by an advocate duly appointed in this behalf, in the specified form with stipulated fee at the filing counter and non compliance of this may constitute a valid ground to refuse to entertain the same
