88The case-law of the Court and of the European Court of Human Rights, and the work of the Council of Europe, by means of the European Commission for Democracy through Law, provide a non-exhaustive list of principles and standards which may fall within the concept of the rule of law. That list includes: the principles of legality and legal certainty and the prohibition of arbitrary exercise of power by the executive; independent and impartial courts; effective judicial review, extending to respect for fundamental rights and equality before the law (see, in that regard, the rule of law checklist adopted by the European Commission for Democracy through Law at its 106th Plenary Session (Venice, 11-12 March 2016)). Further, in the context of European Union external action, a number of legal instruments include reference to the fight against corruption as a principle within the scope of the concept of the rule of law (see, for example, Regulation (EC) No 1638/2006 of the European Parliament and of the Council of 24 October 2006 laying down general provisions establishing a European Neighbourhood and Partnership Instrument (OJ 2006 L 310, p. 1)).