Article 11
1. The Commission, following the procedure laid down in Article 12, shall make the amendments necessitated by scientific and technical progress to the common technical requirements and administrative procedures listed in Annex II or adopted by the Council in accordance with Article 4. 2. Where the amendments referred to in paragraph 1 contain a national variant for a Member State the Commission, following the procedure laid down in Article 12, shall decide whether or not to include that variant in the common technical requirements and administrative procedures.