The accession will have effect only as regards the relations between the acceding State and such Contracting States as will have declared their acceptance of the accession. Such a declaration will also have to be made by any Member State ratifying, accepting or approving the Convention after an accession. Such declaration shall be deposited at the Ministry of Foreign Affairs of the Kingdom of the Netherlands; this Ministry shall forward, through diplomatic channels, a certified copy to each of the Contracting States. The Convention will enter into force as between the acceding State and the State that has declared its acceptance of the accession on the first day of the third calendar month after the deposit of the declaration of acceptance. Article 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. Article 40 If a Contracting State has two or more territorial units in which different systems of law are applicable in relation to matters dealt with in this Convention, it may at the time of signature, ratification, acceptance, approval or accession declare that this Convention shall extend to all its territorial units or only to one or more of them and may modify this declaration by submitting another declaration at any time. Any such declaration shall be notified to the Ministry of Foreign Affairs of the Kingdom of the Netherlands and shall state expressly the territorial units to which the Convention applies. Article 41 Where a Contracting State has a system of government under which executive, judicial and legislative powers are distributed between central and other authorities within that State, its signature or ratification, acceptance or approval of, or accession to this Convention, or its making of any declaration in terms of Article 40 shall carry no implication as to the internal distribution of powers within that State. Article 42 Any State may, not later than the time of ratification, acceptance, approval or accession, or at the time of making a declaration in terms of Article 39 or 40, make one or both of the reservations provided for in Article 24 and Article 26, third paragraph. No other reservation shall be permitted. Any State may at any time withdraw a reservation it has made. The withdrawal shall be notified to the Ministry of Foreign Affairs of the Kingdom of the Netherlands. The reservation shall cease to have effect on the first day of the third calendar month after the notification referred to in the preceding paragraph. Article 43 The Convention shall enter into force on the first day of the third calendar month after the deposit of the third instrument of ratification, acceptance, approval or accession referred to in Articles 37 and 38.