Certificate of Origin procedures require issuing authority verification and controlled issuance to secure preferential tariff entitlement. Operational rules require the Issuing Authority of the exporting party to issue the AIFTA Certificate of Origin on prescribed form, conduct pre export and documentary verification, accept written applications with supporting evidence at exportation, permit retroactive issuance within defined limits, and maintain specimen signatures; certificates must follow form, language, copy distribution and amendment controls and indicate applicable origin criteria and content percentage.