This definition has led the jurisprudence to define a treaty as an international agreement that meets the following criteria: post-modern law post-lawyers regard international law as a single system of rules that emanates from the will of States. International law, as it is, is an “objective” reality that must be distinguished from the law “as it should be”. Classical positivism requires strict legal reviews and considers that not all extra-legal arguments are relevant.  According to the preamble to contract law, treaties are a source of international law. If an act or absence is condemned by international law, the law will not accept its international legality, even if it is authorized by domestic law.  This means that in the event of a conflict with domestic law, international law will always prevail.  Elements of the naturalist and positivist schools were synthesized, notably by the German philosopher Christian Wolff (1679-1754) and the Swiss jurist Emerich de Vattel (1714-67), both of whom sought an average approach to international law. In the 18th century, the positivist tradition gained wider acceptance, although the concept of natural rights continued to weigh in international politics, particularly through the republican revolutions of the United States and France. It was not until the 20th century that the natural world gained prominence in international law. The above provisions are general rules of interpretation that do not pred us to apply specific rules in certain areas of international law. The end of the preamble and the beginning of the agreement itself are often referred to by the words “agreed as follows.” In India, the themes are divided into three lists: the Union, the State and the Simultaneous. In the normal legislative process, issues on the trade union list must be regulated by law by the Indian parliament. For the subjects on the national list, only the state legislator can legislate.
Both governments can legislate on subjects on the same list. However, for the implementation of international treaties, Parliament can legislate on any subject and even repeal the general distribution of lists of subjects. Beyond the natural propensity of a state to set certain standards, the strength of international law comes from the pressure that states exert on each other to behave coherently and fulfill their obligations.