OECD Convention : Article 15 : Entry into Force

This Convention shall enter into force on the sixtieth day following the date upon which five of the ten countries which have the ten largest export shares (see annex), and which represent by themselves at least sixty per cent of the combined total exports of those ten countries, have deposited their instruments of acceptance, approval, or ratification. For each signatory depositing its instrument after such entry into force, the Convention shall enter into force on the sixtieth day after deposit of its instrument.
If, after 31 December 1998, the Convention has not entered into force under paragraph 1 above, any signatory which has deposited its instrument of acceptance, approval or ratification may declare in writing to the Depositary its readiness to accept entry into force of this Convention under this paragraph 2. The Convention shall enter into force for such a signatory on the sixtieth day following the date upon which such declarations have been deposited by at least two signatories. For each signatory depositing its declaration after such entry into force, the Convention shall enter into force on the sixtieth day following the date of deposit.