The Federal Constitution of Brazil stipulates that the power to enter into contracts is vested in the President of Brazil and that these treaties must be approved by the Brazilian Congress (Articles 84, Clauses VIII and 49, Clause I). In practice, this has been interpreted as being free for the executive to negotiate and sign a treaty, but that its ratification by the president requires the prior approval of Congress. In addition, the Federal Supreme Court decided that after the ratification and entry into force of a presidential decree published in the Federal Register, a treaty must be incorporated into national legislation in order for it to be valid in Brazil and applicable by the Brazilian authorities. International agreements, which enter into force on a constitutional basis other than with the Council and the approval of the Senate, are “non-treaty international agreements” and are often referred to as “executive agreements”. Congress generally requires notification when concluding such an agreement. A treaty is a formal and explicit written agreement by which states are legally united.  A treaty is an official document that expresses that agreement in terms of words; It is also the objective result of a ceremonial occasion that recognizes the parties and their defined relationships. The publication of a contract does not require academic accreditation or interprofessional contextual knowledge. International treaty law has been largely codified by the Vienna Convention on the Law of Treaties, which sets out the rules and procedures governing the creation, modification and interpretation of treaties, as well as the mediation and resolution of disputes and alleged breaches.  Treaties are recognized as one of the first manifestations of international relations as the main source of international law. As a general rule, a contract comes into force when all parties have signed the contract. A bilateral treaty shall enter into force when both Parties have accepted the conditions laid down in this Treaty. Treaties concluded at the Council of Europe are multilateral treaties, i.e. they are concluded between more than two States. Only two bilateral treaties have been concluded at the Council of Europe. They were concluded between the Council of Europe and France, the Host Country of the Organisation: the Special Agreement on the Seat of the Council of Europe of 2 September 1949 and the Additional Agreement amending certain provisions of the General Agreement on the Privileges and Immunities of the Council of Europe of 18 March 1950. The end of a contract, the Eschatocol (or final protocol), is often indicated by a clause such as “in Witness where” or “in faith whereof”, the parties have affixed their signatures, followed by the words “DONE at”, then the site(s) of the execution of the contract and the date(s) of its execution. The date is usually written in its most formal, non-numeric form. For example, the Charter of the United Nations was made “in the city of San Francisco on the twenty-sixth day of June, one thousand eighty-five.” If the contract is performed in several copies in different languages, it is always noted and the next provision is that the versions are also binding in different languages. . .