6_74 substantive_scope 74. <6> Accordingly, in the Commission's view, the right to freedom of assembly as guaranteed by Article I I para . I must include the right to protection against counter- demonstrators, because it is only in this way that its effective exercise can be secured to social groups wishing to demonstrate for certain principles in highly controversial issues . This interpretation is also in line with the case-law of the Commission accord- ing to which restrictions on a peaceful demonstration can be justified under Art- icle II para . 2 only if disorder arising as a consequence of violent counter- demonstrations cannot be prevented by other less stringent measures (cf .