(1) A request for rehearing after a final decision of the Court may exceptionally be granted by the Court of Appeal in the following circumstances:

1. on discovery of a fact by the party requesting the rehearing, which is of such a nature as to be a decisive factor and which, when the decision was given, was unknown to the party requesting the rehearing; such request may only be granted on the basis of an act which was held, by a final decision of a national court, to constitute a criminal offence; or
2. in the event of a fundamental procedural defect, in particular when a defendant who did not appear before the Court was not served with the document initiating the proceedings or an equivalent document in sufficient time and in such a way as to enable him to arrange for the defence.

(2) A request for a rehearing shall be filed within 10 years of the date of the decision but not later than two months from the date of the discovery of the new fact or of the procedural defect. Such request shall not have suspensive effect unless the Court of Appeal decides otherwise.

(3) If the request for a rehearing is well-founded, the Court of Appeal shall set aside, in whole or in part, the decision under review and re-open the proceedings for a new trial and decision, in accordance with the Rules of Procedure.

(4) Persons using patents which are the subject-matter of a decision under review and who act in good faith should be allowed to continue using such patents.