Faceless appeal procedure: centralized specification of formats, e-appeal, document verification and rules for personal hearings. The Principal Chief Commissioner or Principal Director General, with Board approval, may prescribe standards, procedures and processes for National and Regional Faceless Appeal Centres and appellate units in an automated environment, covering service and receipt of notices and communications, acknowledgments, an e-appeal facility with login and tracking, verification and authentication of submissions, centralised storage and retrieval of documents, administration and grievance redressal, filing additional grounds and evidence, specification of referenced monetary thresholds, and circumstances for approving personal hearings.