The right to freedom of assembly and association is not absolute. Article 11(2) outlines conditions in which restrictions on the exercise of the right are justified: the restriction must be prescribed by law, pursue a legitimate aim, and be necessary in a democratic society.
Prescribed by law Restrictions must have a basis in domestic law, that law must be accessible to those affected and its effects must be foreseeable. A
norm cannot be regarded as law unless it is formulated with sufficient precision to enable a person to reasonably foresee the consequences which a given action may entail. In
Navalnyy v Russia (2018), the Grand Chamber of the ECtHR recognised that the law must indicate with sufficient clarity the scope of any discretion conferred on the executive and the manner of its exercise, so as to afford adequate protection against arbitrary interference with fundamental rights.
Legitimate aim Restrictions must pursue one of the aims listed in Article 11(2): the interests of
national security or public safety, the prevention of disorder or crime, the protection of health or morals, or the protection of the rights and freedoms of others. These exceptions are interpreted narrowly.
Necessary in a democratic society A restriction must answer a "pressing social need" and be proportionate to the legitimate aim pursued. States must give relevant and sufficient reasons for interference, and the authorities must have applied standards that conform to the principles of the Convention. The ECtHR conducts a proportionality analysis, weighing the requirement of the aims listed in Article 11(2) against the free expression of opinions by persons assembled in public places. During this assessment, states enjoy a
margin of appreciation of varied scope, depending on the specific circumstances. A government must not have the power to ban a demonstration because it considers the demonstrators’ message to be wrong. == Enforcement ==