1. If, after the date on which this Convention has entered into force with respect to a Contracting State, that State wishes to become a party to a multilateral convention whose principal aim or one of whose principal aims is to lay down rules of private international law concerning any of the matters governed by this Convention, the procedure set out in Article 23 shall apply. However, the period of two years, referred to in paragraph 3 of that Article, shall be reduced to one year.

2. The procedure referred to in the preceding paragraph need not be followed if a Contracting State or one of the European Communities is already a party to the multilateral convention, or if its object is to revise a convention to which the State concerned is already a party, or if it is a convention concluded within the framework of the Treaties establishing the European Communities.