Rules of origin: eligibility for special tariff concessions requires origin certification and minimum local value content. Eligibility for the Special Tariff Concession for goods from the United Arab Republic and Yugoslavia requires compliance with the Rules of Origin: goods must be wholly produced or have the final manufacturing process performed in the exporting Participating State and the expenditure on materials and labour within that State must meet the prescribed minimum proportion of factory or works cost, with claims made at importation supported by a certificate of origin issued by an authorised governmental body.