—representatives nominated by the competent national authorities to participate in the working parties,
—professionals from the railway sector selected by the Agency from the list referred to in paragraph 3. The Agency shall ensure adequate representation of those sectors of the industry and of those users which could be affected by measures the Commission may propose on the basis of the recommendations addressed to it by the Agency. The Agency shall strive, where possible, for a balanced geographical representation.
The Agency may, if necessary, appoint to the working parties independent experts and representatives of international organisations recognised as competent in the field concerned. Members of the staff of the Agency may not be appointed to the working parties, except for the chair of the working parties, who shall be a representative of the Agency.