Art. 99 CISG

(1) This Convention enters into force, subject to the provisions of paragraph (6) of this article, on the first day of the month following the expiration of twelve months after the date of deposit of the tenth instrument of ratification, acceptance, approval or accession, including an instrument which contains a declaration made under article 92.

(2) When a State ratifies, accepts, approves or accedes to this Convention after the deposit of the tenth instrument of ratification, acceptance, approval or accession, this Convention, with the exception of the Part excluded, enters into force in respect of that State, subject to the provisions of paragraph (6) of this article, on the first day of the month following the expiration of twelve months after the date of the deposit of its instrument of ratification, acceptance, approval or accession.

(3) A State which ratifies, accepts, approves or accedes to this Convention and is a party to either or both the Convention relating to a Uniform Law on the Formation of Contracts for the International Sale of Goods done at The Hague on 1 July 1964 (1964 Hague Formation Convention) and the Convention relating to a Uniform Law on the International Sale of Goods done at The Hague on 1 July 1964 (1964 Hague Sales Convention) shall at the same time denounce, as the case may be, either or both the 1964 Hague Sales Convention and the 1964 Hague Formation Convention by notifying the Government of the Netherlands to that effect.

(4) A State party to the 1964 Hague Sales Convention which ratifies, accepts, approves or accedes to the present Convention and declares or has declared under article 52 that it will not be bound by Part II of this Convention shall at the time of ratification, acceptance, approval or accession denounce the 1964 Hague Sales Convention by notifying the Government of the Netherlands to that effect.

(5) A State party to the 1964 Hague Formation Convention which ratifies, accepts, approves or accedes to the present Convention and declares or has declared under article 92 that it will not be bound by Part III of this Convention shall at the time of ratification, acceptance, approval or accession denounce the 1964 Hague Formation Convention by notifying the Government of the Netherlands to that effect.

(6) For the purpose of this article, ratifications, acceptances, approvals and accessions in respect of this Convention by States parties to the 1964 Hague Formation Convention or to the 1964 Hague Sales Convention shall not be effective until such denunciations as may be required on the part of those States in respect of the latter two Conventions have themselves become effective. The depositary of this Convention shall consult with the Government of the Netherlands, as the depositary of the 1964 Conventions, so as to ensure necessary co-ordination in this respect.

Overview of case law on Art. 99 CISG: UNCITRAL Digest

The UNCITRAL Digest on the CISG can be used as a starting point to discover the relevant case law on this article.