1. On importation, customs duties are levied according to the origin of the goods, except where special provisions for the granting of preferential tariffs are laid down by international commitments in force.
2. Natural products originate in the country where they were extracted from the soil or harvested.
Products manufactured in a single country, without the addition of materials from another country, originate in the country where they were manufactured.
3. Orders issued by the Minister for the Economy and Finance lay down the rules for determining the origin of goods obtained in one country using products harvested, extracted from the soil or manufactured in another country.
4. Imported products do not benefit from the preferential treatment attributed to their origin unless this origin is duly justified. Orders issued by the Minister for the Economy and Finance set the conditions under which proof of origin must be produced and the cases in which proof is not required.