Artikel 19

1. A State may declare that it shall not apply this Convention to judgments arising from proceedings to which any of the following is a party –
a) that State, or a natural person acting for that State; or
b) a government agency of that State, or a natural person acting for such a government agency.
The State making such a declaration shall ensure that the declaration is no broader than necessary and that the exclusion from scope is clearly and precisely defined. The declaration shall not distinguish between judgments where the State, a government agency of that State or a natural person acting for either of them is a defendant or claimant in the proceedings before the court of origin.
2. Recognition or enforcement of a judgment given by a court of a State that made a declaration pursuant to paragraph 1 may be refused if the judgment arose from proceedings to which either the State that made the declaration or the requested State, one of their government agencies or a natural person acting for either of them is a party, to the same extent as specified in the declaration.