Artikel 19

No post-judgment measures of constraint, such as attachment, arrest or execution, against property of a State may be taken in connection with a proceeding before a court of another State unless and except to the extent that:
a) the State has expressly consented to the taking of such measures as indicated: (i) by international agreement;
(ii) by an arbitration agreement or in a written contract; or
(iii) by a declaration before the court or by a written communication after a dispute between the parties has arisen; or
(i) by international agreement;
(ii) by an arbitration agreement or in a written contract; or
(iii) by a declaration before the court or by a written communication after a dispute between the parties has arisen; or
b) the State has allocated or earmarked property for the satisfaction of the claim which is the object of that proceeding; or
c) it has been established that the property is specifically in use or intended for use by the State for other than government non-commercial purposes and is in the territory of the State of the forum, provided that postjudgment measures of constraint may only be taken against property that has a connection with the entity against which the proceeding was directed.