Does state behavior contrary to a rule of customary international law undermine the existence of that rule?

Essay from the year 2020 in the subject Law - European and International Law, Intellectual Properties, , language: English, abstract: The purpose of this essay is to assess the impact of the behaviour of a State, which contrary to a rule of customary international law, on the existence of rule of customary international law, in terms of whether it undermines the existence of that rule or strengthens it. To be able to do this, it is expedient that the following issues are addressed: What is Customary International Law? What are rules of customary international law? Contrary state behavior.Customary International Law is one of the major sources of International law and is described in Article 38(1)(b) of the Statute of the International Court of Justice, 1946, as "general practice accepted as law." According to the Legal Information Institute of the Cornell Law School, "Customary international law refers to international obligations arising from established international practices, as opposed to obligations arising from formal written conventions and treaties. Customary international law results from a general and consistent practice of states that they follow from a sense of legal obligation." It was also defined by Judge Read in Fisheries (UK v Norway) (1951), as the generalization of the practice of States.