The court discusses the conditions under which a party may be estopped from raising a ground for refusal of enforcement under the Convention or has waived the right to raise it.
Estoppel/waiver
504
Paragraph 1 - Ground a: Invalidity of the arbitration agreement - Agreement referred to in Art. II
506
Invalidity of the arbitration agreement: The court discusses the law applicable to the validity of the arbitration agreement at the enforcement stage.
Law applicable to the arbitration agreement
510
Due process: The court discusses what are to be considered proper time limits and notice periods that fulfill the requirement that the party opposing recognition and enforcement of the arbitral award was extended due process.
Time limits and notice periods
513
Ground d: Irregularity in the composition of the arbitral tribunal or arbitral procedure