26 AL-NASHIF v. BULGARIA JUDGMENT 119. The Court reiterates that the phrase “in accordance with the law” implies that the legal basis must be “accessible” and “foreseeable”. A rule's effects are “foreseeable” if it is formulated with sufficient precision to enable any individual – if need be with appropriate advice – to regulate his conduct. In addition, there must be a measure of legal protection in domestic law against arbitrary interferences by public authorities with the rights safeguarded by the Convention. It would be contrary to the rule of law for the legal discretion granted to the executive in areas affecting fundamental rights to be expressed in terms of an unfettered power. Consequently, the law must indicate the scope of any such discretion conferred on the competent authorities and the manner of its exercise with sufficient clarity, having regard to the legitimate aim of the measure in question, to give the individual adequate protection against arbitrary interference (see Amann v. Switzerland [GC], no. 27798/95, ECHR 2000-II, §§ 55 and 56, Rotaru v. Romania [GC], no. 28341/95, ECHR 2000-V, §§ 55-63, Hasan and Chaush v. Bulgaria [GC], no. 30985/96, ECHR 2000-XI, and the Klass and Others v. Germany judgment of 6 September 1978, Series A no. 28). 120. The Government's position was that although the Aliens Act did not circumscribe the cases in which a person might be considered a threat to national security so as to warrant his deportation, the term “national security” was clarified in the Framework National Security Concept (see paragraph 83 above). 121. The Court reiterates that as regards the quality of law criterion, what is required by way of safeguards will depend, to some extent at least, on the nature and extent of the interference in question (see P.G. and J.H. v. the United Kingdom, no. 44787/98, ECHR 2001-IX, § 46). It considers that the requirement of “foreseeability” of the law does not go so far as to compel States to enact legal provisions listing in detail all conduct that may prompt a decision to deport an individual on national security grounds. By the nature of things, threats to national security may vary in character and may be unanticipated or difficult to define in advance. 122. There must, however, be safeguards to ensure that the discretion left to the executive is exercised in accordance with the law and without abuse. 123. Even where national security is at stake, the concepts of lawfulness and the rule of law in a democratic society require that measures affecting fundamental human rights must be subject to some form of adversarial proceedings before an independent body competent to review the reasons for the decision and relevant evidence, if need be with appropriate procedural limitations on the use of classified information (see the judgments cited in paragraph 119 above).