The exchange of documents is provided for in Article 13 of the 1969 Vienna Convention. This procedure is usually done through the exchange of diplomatic notes. In practice, the notes in question often indicate that the exchange of documents takes effect in this contract only if each party has informed the other party of the conclusion of its constitutional procedures. It is a bit like ratification.  Before discussing international treaties further, you need to know the terms of international treaties. This way, you will more easily understand the subtleties in international agreements. The legal status of contracts in national law depends on the laws of each country. In general, there are two approaches that are often applied, namely monism and dualism. Monism is based on the premise that international law and national law are part of the same legal order.  Therefore, a treaty can be directly part of national law without the need to proclaim it first. In countries that follow monism, the agreement normally has to be approved by Parliament. After approval, the content of the agreement is considered a higher law than a national law.  Examples of countries with monismic approaches are France and the Netherlands.
In the meantime, the dualism approach is based on the premise that national law and international law constitute two distinct legal systems.  Therefore, countries that have dealt with dualism have no interference in the treaty. . . .