The 300 new agreements of recent years have been partly catalyzed by the fact that the current round of Doha wto negotiations has not been successful for more than 15 years. Note that WTO rules take into account bilateral and regional agreements, which are repeatedly described as complements, complications and creative tensions with the WTO. We think it is less Eurocentric than our decision, Asking the authors to end their respective reports in 1945 because the end of the Second World War and the founding of the United Nations mark a break not only in Western history, but also in world history.9 Of course it is possible to write a history of international law in the 1950s or 1960s. , but from a broader perspective, current international law is still the law of the united states. Nations founded in 1945. Given that European regionalisation has been able to launch many other regional trade agreements in Africa, the Caribbean, Central and South America, it has also helped to advance the GATT agenda, with other countries seeking further tariff reductions to compete with the preferential trade that the European partnership has produced. Thus, regionalism has not necessarily increased at the expense of multilateralism, but in conjunction with it. The advance towards regionalism was probably due to the growing needs of countries to go beyond the GATT provisions at a much faster rate. There are three ways to change an existing treaty. First, a formal change requires that States Parties be forced to go through the ratification process again. The renegotiation of the treaty provisions can be long and time-consuming and often some parties to the original treaty will not become parties to the amended treaty. In determining the legal obligations of states, a party to the original treaty and a party to the amended treaty, states are bound only by the conditions on which they have agreed.

Contracts may also be amended informally by the treaty office if the amendments are procedural in nature, and technical changes in customary international law may also alter a contract in which the state`s conduct presents a reinterpreting interpretation of legal obligations arising from the treaty.