Article 54U.K.
The provisions of this Convention shall apply only to legal proceedings instituted and to documents formally drawn up or registered as authentic instruments after its entry into force in the State of origin and, where recognition or enforcement of a judgment or authentic instrument is sought, in the State addressed.
However, judgments given after the date of entry into force of this Convention between the State of origin and the State addressed in proceedings instituted before that date shall be recognised and enforced in accordance with the provisions of Title III if jurisdiction was founded upon rules which accorded with those provided for either in Title II of this Convention or in a convention concluded between the State of origin and the State addressed which was in force when the proceedings were instituted.
If the parties to a dispute concerning a contract had agreed in writing before the entry into force of this Convention that the contract was to be governed by the law of Ireland or of a part of the United Kingdom, the courts of Ireland or of that part of the United Kingdom shall retain the right to exercise jurisdiction in the dispute.