The margin of appreciation (or margin of state discretion) is a legal doctrine with a wide scope in international human rights law. It was developed by the European Court of Human Rights to judge whether a state party to the European Convention on Human Rights should be sanctioned for limiting the enjoyment of rights. The doctrine allows the court to reconcile practical differences in implementing the articles of the convention. Such differences create a limited right for contracting parties "to derogate from the obligations laid down in the Convention".[1] The doctrine also reinforces the role of the European Convention as a supervisory framework for human rights. In applying that discretion, the court's judges must take into account differences between domestic laws of the contracting parties as they relate to substance and procedure.[2] The margin of appreciation doctrine contains concepts that are analogous to the principle of subsidiarity, which occurs in the unrelated field of EU law. The purposes of the margin of appreciation are to balance individual rights with national interests and to resolve any potential conflicts. It has been suggested that the European Court should generally refer to the State's decision, as it is an international court, instead of a bill of rights.[3]
This doctrine has been rejected by the Inter-American Court of Human Rights.[4]