Article 6 2.

At trade fairs, exhibitions, demonstrations, and similar events, Member States shall not prevent the showing of equipment referred to in Article 2(1) which does not conform to the provisions of this Directive, provided that a visible sign clearly indicates that such equipment does not conform and that it is not placed on the market or put into service until it has been brought into conformity by the manufacturer or his authorised representative established in the Community. During demonstrations adequate safety measures shall be taken to ensure the protection of persons.