Thai Supreme Court On Arbitration Clauses: When “May” Means “Must”

Arbitration clauses and national court jurisdiction have long existed in a delicate equilibrium, and nowhere is that equilibrium tested more often than in the drafting of multitier dispute resolution clauses. Such clauses—requiring negotiation before arbitration—are ubiquitous in international construction contracts, and they frequently employ permissive vocabulary at the arbitration tier. The formulation “either party may submit the dispute to arbitration” is intended to signal that either side is entitled to initiate proceedings. Yet it is periodically seized upon by claimants who prefer national courts, on the theory that “may” preserves a parallel right to litigate. Each apex-court pronouncement on this question is therefore significant for drafting practice and forum predictability.