4. —Judicial notice shall be taken of the Convention provisions and of—

(a) any declaration, decision, advisory opinion or judgment of the European Court of Human Rights established under the Convention on any question in respect of which that Court has jurisdiction,

(b) any decision or opinion of the European Commission of Human Rights so established on any question in respect of which it had jurisdiction,

(c) any decision of the Committee of Ministers established under the Statute of the Council of Europe on any question in respect of which it has jurisdiction,

and a court shall, when interpreting and applying the Convention provisions, take due account of the principles laid down by those declarations, decisions, advisory opinions, opinions and judgments.