While it is rare to see soft things in the multilateral field, transnational air agreements are in fact soft. A Memorandum of Understanding (MOU or MoU) is an agreement between two or more parties, which is described in a formal document. It is not legally binding, but it indicates that the parties are ready to move forward with a treaty. A Memorandum of Understanding (Memorandum of Understanding) is a kind of agreement between two (bilateral) or more (multilateral) parties. It expresses an agreement of will between the parties and indicates a planned common course of action.  It is frequently used either in cases where the parties do not involve a legal obligation, or in situations where the parties are unable to enter into a legally binding agreement. It is a more formal alternative to a gentlemen`s agreement.   In the United Kingdom, the term MoU is often used to enter into an agreement between parties to The Crown. This term is often used in the context of decentralization, for example. B in the 1999 concorda between the Central Ministry of Environment, Food and Rural Affairs and the Scottish Environment Directorate. Not everyone agrees on the benefits of an agreement.
During trade negotiations with a Chinese representative in Washington in April 2019, a reporter asked President Donald Trump how long he expected the U.S. and China`s declarations of intent to continue. “I don`t like MOUs because they don`t mean anything,” the president replied. After some discussions, it was decided that any document from the discussions should be qualified as a trade agreement and never agreed. In the economy, a protocol is generally a legally non-binding agreement between two or more parties that defines the terms and modalities of mutual understanding or agreement and notes the requirements and responsibilities of each party – without concluding a formal and legally enforceable contract (although a MoU is often a first step towards the development of a formal contract).   An agreement is the expression of consent as a result of the proceedings. It shows that the parties have reached an agreement and are making progress. Although not legally binding, it is a serious explanation for the impending treaty.