Fungible materials: a provision that determines how non-native and native materials should be tracked (taking into account) when the two species are stored together and/or used to manufacture native or non-native products. It allows the two types of goods to be prosecuted, not by physical identification and separation, but on the basis of an accounting or inventory management system. The WTO manages the original agreement. It holds commissions for the rules of origin. Although the WTO`s work in the WTO concerns non-preferential rules of origin, the current LDC Rules of Origin initiative is an important work that the WTO is pursuing. It requires members who undertake, in accordance with ministerial declarations, to submit notifications regarding their rules of origin in preferential treatment of LDCs. The WTO website on non-preferential rules of origin provides an archive of documents on members` non-preferential rules of origin.  It also provides a database of preferential rules of origin declared under the LDC initiative.  As part of a joint initiative with the WCO and the WTO, the International Trade Centre introduces the rules of the Original Ombudsman which, in hundreds of trade agreements, provides free and user-friendly access to the ITC database containing rules of origin and original documents. The moderator is also associated with the huge databases on tariffs and trade agreements established since 2006 by the ITC Market Access Card and maintained continuously, leading to a unique market intelligence solution that allows companies, particularly in developing countries, to benefit from trade agreements around the world. The moderator currently contains data on more than 230 free trade agreements applied by more than 190 countries, as well as non-preferential regulations from the EU, the Us and Switzerland.
This database will be gradually expanded, with the ultimate goal of covering more than 400 free trade agreements and preferential regimes currently active worldwide. Rules of origin have become increasingly controversial as preferential tariff regions and the anti-dumping regimes they require are bankrupt. As a result, most international agreements now contain provisions for countries to negotiate specific criteria for certain products. For example, NAFTA has adopted the rule that any tea fermented or packaged in a NAFTA country is considered to be of origin, regardless of where it was originally grown. Certification exemption: a provision that lists exceptions to the requirement to issue proof of origin. In certain circumstances, products originating without proof of origin may be imported into an ESTV country and continue to be treated as original products. In addition, the new WTO Trade Facilitation Agreement also contains new benchmarks for customs aspects of the implementation of rules of origin. Thus, the article of this agreement provides that each member ”appropriately and over time renders a preliminary decision on the origin of the goods to the applicant who has submitted a written application containing all the necessary information.”  In essence, a shipment must be accompanied by proof of origin in order to receive preferential treatment.
The most popular form of proof of origin required in most trade agreements is a certificate of origin. There are also other forms of evidence of origin. B, for example, a statement of origin or a declaration of origin. Many agreements offer value thresholds below which proof of origin can be waived. The rules can be expressed in two ways: a maximum premium for non-native inputs or a minimum requirement for local content. Because of this role, rules of origin also help to create exchanges between members of a preferential trade agreement.