Article 35 — Mutual assistance in the event of case-by-case derogations

1. Where a Member State intends to take a measure pursuant to Article 18, the procedure laid down in paragraphs 2 to 6 of this Article shall apply without prejudice to court proceedings, including preliminary proceedings and acts carried out in the framework of a criminal investigation.
2. The Member State referred to in paragraph 1 shall ask the Member State of establishment to take measures with regard to the provider, supplying all relevant information on the service in question and the circumstances of the case.

   The Member State of establishment shall check, within the shortest possible period of time, whether the provider is operating lawfully and verify the facts underlying the request. It shall inform the requesting Member State within the shortest possible period of time of the measures taken or envisaged or, as the case may be, the reasons why it has not taken any measures.

3. Following communication by the Member State of establishment as provided for in the second subparagraph of paragraph 2, the requesting Member State shall notify the Commission and the Member State of establishment of its intention to take measures, stating the following:
   1. the reasons why it believes the measures taken or envisaged by the Member State of establishment are inadequate;
   2. the reasons why it believes the measures it intends to take fulfil the conditions laid down in Article 18.
4. The measures may not be taken until fifteen working days after the date of notification provided for in paragraph 3.
5. Without prejudice to the possibility for the requesting Member State to take the measures in question upon expiry of the period specified in paragraph 4, the Commission shall, within the shortest possible period of time, examine the compatibility with Community law of the measures notified.

   Where the Commission concludes that the measure is incompatible with Community law, it shall adopt a decision asking the Member State concerned to refrain from taking the proposed measures or to put an end to the measures in question as a matter of urgency.

6. In the case of urgency, a Member State which intends to take a measure may derogate from paragraphs 2, 3 and 4. In such cases, the measures shall be notified within the shortest possible period of time to the Commission and the Member State of establishment, stating the reasons for which the Member State considers that there is urgency.