The Vienna Convention on Consular Relations is an international treaty that establishes a framework for consular relations between sovereign states. It codifies many consular practices stemming from state practices and various bilateral agreements between states.  During the history of sovereign states, diplomats enjoy a special status. Their function of negotiating agreements between states requires certain special privileges. An emissary from another nation is traditionally treated as a guest, his communication with his homeland is considered confidential and his freedom of coercion and submission by the host country is considered essential. In the year the treaty was adopted, two amending protocols were added. Countries can ratify the main treaty without necessarily ratifying these optional agreements. The Convention codifies several foundations of contemporary international law. It defines a treaty as “an international agreement that is written and governed by international law between states” and asserts that “every state has the capacity to conclude treaties.” Article 1 limits the application of the convention to written contracts between states, with the exception of treaties between states and international organizations or international organizations themselves. Article 26 defines pacta sunt servanda, article 53 proclaims the mandatory standard, and Article 62 proclaims a fundamental change in circumstances. The general objective of these international agreements and agreements, of which the Secretary-General of the United Nations is the custodian, is to facilitate international transport while ensuring a high level of security and environmental protection in transport: however, agreements between states and international organizations or between international organisations themselves are governed by the 1986 Vienna Convention on treaty law between states and international organizations or between international organisations. vigour.
Moreover, in treaties between states and international organizations, the provisions of the Convention continue to apply between states.  The convention does not apply to unwritten agreements.  The result was an almost uninterrupted series of conferences and agreements, including the Viennese peace of Vienna in 1725 between Austria and Spain. This orientation was short-lived, Charles VI decided that Austria`s interests were best served by an alliance with Great Britain and the Dutch Republic.  The Convention applies only to contracts concluded after its development and to treaties between states and international organizations or between international organizations themselves, but if one of their rules is independently binding on these organizations, they will remain so.  The VCLT applies to interstate contracts within an intergovernmental organization.  The Vienna Convention on Treaty Law (VCLT) is an international agreement governing treaties between states.  The contract, known as the “contract,” contains detailed rules, procedures and guidelines for the definition, development, modification, interpretation and general operation of contracts.
 The VCLT is considered to be the codification of customary international law and state contract practice.  This was the end of the Anglo-French alliance that had dominated Europe since the Treaty of Utrecht in 1713 and was replaced by the Anglo-Austrian Alliance. After the signing of Spain on July 22, 1731, Austria recognized Karl of Spain as Duke of Parma and Piacenza. Prior to 29 March 2011, the Convention called on the parties to recognize the force of dissemination on their territory: this Treaty on the Treatment of Diplomats was the result of a draft of the Commission on International Law. The treaty was adopted on 18 April 1961 by the United Nations Conference on Diplomatic Transport and Immunities in Vienna (3) and implemented for the first time on 24 April 1964.