Rule-109 of CGST Rules 2017
Application to the Appellate —
(1) An application to the Appellate Authority under sub-section (2) of section 107 shall be made in FORM GST APL-03, along with the relevant documents, either electronically or otherwise as may be notified by the Commissioner.
(2) A certified copy of the decision or order appealed against shall be submitted within seven days of the filing the application under sub-rule (1) and an appeal number shall be generated by the Appellate Authority or an officer authorised by him in this behalf.