1. The powers conferred on the Commission by Articles 23 and 24 shall be subject to the following limitation periods:

(a) three years in the case of infringements of provisions concerning requests for information or the conduct of inspections;

(b) five years in the case of all other infringements.

2. Time shall begin to run on the day on which the infringement is committed. However, in the case of continuing or repeated infringements, time shall begin to run on the day on which the infringement ceases.

3. Any action taken by the Commission or by the competition authority of a Member State for the purpose of the investigation or proceedings in respect of an infringement shall interrupt the limitation period for the imposition of fines or periodic penalty payments. The limitation period shall be interrupted with effect fromthe date on which the action is notified to at least one undertaking or association of undertakings which has participated in the infringement. Actions which interrupt the running of the period shall include in particular the following:

(a) written requests for information by the Commission or by the competition authority of a Member State;

(b) written authorisations to conduct inspections issued to its officials by the Commission or by the competition authority of a Member State;

(c) the initiation of proceedings by the Commission or by the competition authority of a Member State;