Acceptance of defective appeals: Tribunal may allow amendments on sufficient cause, or reject for non-compliance within set time. Rule 11 authorises the Tribunal to accept defective memoranda of appeal on showing sufficient cause, subject to filing missing documents or making amendments within a prescribed time-limit, and to reject them if compliance is not met; re-presented memoranda must be signed by the competent officer, the President may authorise return and conditional refiling of non compliant documents, and the Bench retains discretion over acceptance and restoration of appeal numbers.