The court discusses issues relating to the quality of the parties, as physical or legal persons against whom enforcement of an arbitral award is sought, including the incapacity of a State to enter into an arbitration agreement, and questions relating to sovereign immunity. For the related defenses to enforcement, see Art. V(1)(a).

The court discusses the meaning and effect of the referral of the resolution of disputes to arbitration, including: who can ask for referral and when, whether a party has waived its right to request arbitration, the defense that there was no contract at all; whether there was a condition precedent to the commencement of arbitration (e.g. mediation), stay of proceedings v. compelling arbitration, and national procedural specificities such as remand and removal (US), effect of class action. etc.

Multi-party disputes: The court discusses under which conditions non-signatories are covered by an arbitration agreement entered into by another party.