Procedural Estoppel in International Commercial Arbitration Proceedings

This article argues that arbitral practice has effectively given rise to a general principle whereby the parties to arbitral proceedings are deemed to have waived rights arising from a procedural rule where they have failed to timely raise an objection against a procedural irregularity. Tribunals do not refer to such a process as abuse of right, or procedural estoppel, but as a tacit waiver of procedural rights. Even so, the effects are the same. This rule is well enshrined in article 4 of the UNCITRAL Model Law on International Commercial Arbitration. There is a line of domestic case law suggesting that the presumption in favour of the waiver does not apply where the party in question had no knowledge of the facts giving rise to the breach; where failure to apply it was not predicated on bad faith and/or; where the delay in exercising the right was not significant.