Article 71d

This Regulation shall apply to the recognition and enforcement of:
(a) judgments given by a common court which are to be recognised and enforced in a Member State not party to the instrument establishing the common court; and
(b) judgments given by the courts of a Member State not party to the instrument establishing the common court which are to be recognised and enforced in a Member State party to that instrument.
However, where recognition and enforcement of a judgment given by a common court is sought in a Member State party to the instrument establishing the common court, any rules of that instrument on recognition and enforcement shall apply instead of the rules of this Regulation.