August 19, 2026
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.
In 2019, the Thai Supreme Court delivered Thailand’s clearest answer to date (Judgment No. 3427/2562). Reversing an appellate court decision, the Supreme Court held that permissive wording at the point of commencement does not dilute the parties’ antecedent agreement to withdraw their disputes from the courts—doing so in regard to an International Chamber of Commerce (ICC) arbitration clause seated in Singapore, a configuration typical of foreign-invested projects in Thailand. This article examines the court’s reasoning, situates the decision within comparative jurisprudence, and draws out its practical lessons for parties and drafters operating in the Thai market.
Background of the Dispute
The dispute arose from a subcontract for civil engineering and architectural works concluded on September 25, 2014. Clause 19 of the subcontract governed dispute resolution. Clause 19.1 required the parties, at the request of either, to seek to resolve any dispute “in connection with, arising out of, or relating to” the subcontract through mutual consultation within sixty days of written notice. According to clause 19.2.1, if the dispute could not be resolved within that period, “either party may submit the dispute to arbitration,” to be conducted under the ICC rules with the