Artikel 39

Any State may, at the time of signature, ratification, acceptance, approval or accession, declare that the Convention shall extend to all the territories for the international relations of which it is responsible, or to one or more of them. Such a declaration shall take effect at the time the Convention enters into force for that State.
Such declaration, as well as any subsequent extension, shall be notified to the Ministry of Foreign Affairs of the Kingdom of the Netherlands.