Revision application under Customs Act: procedures for filing, required annexures, fee proof and verification must be followed. Revision applications for central government review must use the prescribed form, identify the applicant and the authority and order under challenge, state reliefs sought, and set out a concise statement of facts with numbered grounds. Applications must be filed in duplicate in English or Hindi, include copies of the impugned order and appellate decision, show whether duty or penalty has been deposited, include the duplicate T.R. 6 challan as proof of payment of the prescribed fee, and attach authorisation when signed by a representative; verification by the applicant is required.