1. In order to carry out the duties assigned to it by this Regulation, the Commission may, by simple request or by decision, require the persons referred to in Article 3(1)(b), as well as undertakings and associations of undertakings, to provide all necessary information.

2. When sending a simple request for information to a person, an undertaking or an association of undertakings, the Commission shall state the legal basis and the purpose of the request, specify what information is required and fix the time limit within which the information is to be provided, as well as the penalties provided for in Article 14 for supplying incorrect or misleading information.

3. Where the Commission requires a person, an undertaking or an association of undertakings to supply information by decision, it shall state the legal basis and the purpose of the request, specify what information is required and fix the time limit within which it is to be provided. It shall also indicate the penalties provided for in Article 14 and indicate or impose the penalties provided for in Article 15. It shall further indicate the right to have the decision reviewed by the Court of Justice.