To benefit from the preferences provided for by bilateral or multilateral conventions and agreements, exports made within this framework must comply with the origin criteria required by the customs administration. Certificates of origin are classified into two categories:
Conventional certificates of origin (for trade governed by bilateral or multilateral preferential tariff agreements).
Certificates of origin under common law (for trade not governed by preferential tariff agreements, when the origin criteria as defined in the framework of preferential relations are not met, re-export of foreign products or when the certificate of origin is required as documentary evidence in addition to the conventional certificate of origin or at the exporter’s request)