"The law must indicate the scope of any such discretion conferred on the competent authority so as to give the individual adequate protection against arbitrary interference."
"The requirement of any interference must be 'in accordance with the law', under Article 8 paragraph 2, means that the impugned measure must have some basis in domestic law and be compatible with the rule of law which is expressly mentioned in the preamble to the convention and inherent in the object and purpose of Article 8. The law must thus be adequately accessible and foreseeable, that is formulated with sufficient precision to enable the individual, if need be with appropriate advice to regulate his conduct. For domestic law to meet these requirements it must afford adequate legal protection against arbitrariness and accordingly indicate with sufficient clarity the scope of discretion conferred on the competent authorities and the manner of its exercise."
"In particular, 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 expel an individual on national security grounds."