67. Examination of cases.

The European Court of Human Rights1 must examine the case together with the representatives of the parties and, if need be, undertake an investigation, for the effective conduct of which the High Contracting Parties concerned must furnish all necessary facilities2. High Contracting Parties and the Council of Europe Commissioner may take part3. Hearings must be in public unless the Court in exceptional circumstances decides otherwise4.

Where a case pending before a Chamber raises a serious question affecting the interpretation of the Convention