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 strengthe...