to determine whether a party is domiciled in the Contracting State whose courts are seised of the matter, the court shall apply its internal law.
 If a party is not domiciled in the State whose courts are seised of the matter, then, in order to determine whether the party is domiciled in another Contracting State, the court shall apply the law of that State.
 The domicile of a party shall, however, be determined in accordance with his national law if, by that law, his domicile depends on that of another person or on the seat of an authority.
 Article 53
 For the purposes of this Convention, the seat of a company or other legal person or association of natural or legal persons shall be treated as its domicile. However, in order to determine that seat, the court shall apply its rules of private international law.
 TITLE VI
 TRANSITIONAL PROVISIONS
 Article 54
 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.
 However, judgments given after the date of entry into force of this Convention in proceedings instituted before that date shall be recognized 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.
 TITLE VII
 RELATIONSHIP TO OTHER CONVENTIONS
 Article 55
 Subject to the provisions of the second paragraph of Article 54, and of Article 56, this Convention shall, for the States which are parties to it, supersede the following conventions concluded between two or more of them:
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 the Convention between Belgium and France on jurisdiction and the validity and enforcement of judgments, arbitration awards and authentic instruments, signed at Paris on 8 July 1899,
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 the Convention between Belgium and the Netherlands on jurisdiction, bankruptcy, and the validity and enforcement of judgments, arbitration awards and authentic instruments, signed at Brussels on 28 March 1925,
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 the Convention between France and Italy on the enforcement of judgments in civil and commercial matters, signed at Rome on 3 June 1930,
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 the Convention between Germany and Italy on the recognition and enforcement of judgments in civil and commercial matters, signed at Rome on 9 March 1936,
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 the Convention between the Federal Republic of Germany and the Kingdom of Belgium on the mutual recognition and enforcement of judgments, arbitration awards and authentic instruments in civil and commercial matters, signed at Bonn on 30 June 1958,
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 the Convention between the Kingdom of the Netherlands and the Italian Republic on the recognition and enforcement of judgments in civil and commercial matters, signed at Rome on 17 April 1959,
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 the Convention between the Kingdom of Belgium and the Italian Republic on the recognition and enforcement of judgments and other enforceable instruments