Article 12
Inquiry into sectors of the economy 1. If in any sector of the economy the trend of trade between Member States, price movements, inflexibility of prices or other circumstances suggest that in the economic sector concerned competition is being restricted or distorted within the common market, the Commission may decide to conduct a general inquiry into that economic sector and in the course thereof may request undertakings in the sector concerned to supply the information necessary for giving effect to the principles formulated in Articles 85 and 86 of the Treaty and for carrying out the duties entrusted to the Commission. 2. The Commission may in particular request every undertaking or association of undertakings in the economic sector concerned to communicate to it all agreements, decisions and concerted practices which are exempt from notification by virtue of Article 4 (2) and Article 5 (2). 3. When making inquiries pursuant to paragraph 2, the Commission shall also request undertakings or groups of undertakings whose size suggests that they occupy a dominant position within the common market or a substantial part thereof to supply to the Commission such particulars of the structure of the undertakings and of their behaviour as are requisite to an appraisal of their position in the light of Article 86 of the Treaty. 4. Article 10 (3) to (6) and Articles 11, 13 and 14 shall apply correspondingly.