Artikel 30

1. Declarations referred to in Articles 14, 17, 18, 19 and 25 may be made upon signature, ratification, acceptance, approval or accession or at any time thereafter, and may be modified or withdrawn at any time.
2. Declarations, modifications and withdrawals shall be notified to the depositary.
3. A declaration made at the time of signature, ratification, acceptance, approval or accession shall take effect simultaneously with the entry into force of this Convention for the State concerned.
4. A declaration made at a subsequent time, and any modification or withdrawal of a declaration, shall take effect on the first day of the month following the expiration of three months following the date on which the notification is received by the depositary.
5. A declaration made at a subsequent time, and any modification or withdrawal of a declaration, shall not apply to judgments resulting from proceedings that have already been instituted before the court of origin when the declaration takes effect.