The permissible scope of witness testimony in arbitral hearings—five proposed rules
Keyword(s):
Soft Law
◽
Abstract At least one surprise occurs in every arbitral hearing. One of those surprises is when a witness testifies beyond what has been submitted in his written witness statement. Often, such ‘out-of-scope’ testimony is unexpected, astonishing, and crucial for the outcome of the case. Surprisingly, the adequate handling of such unexpected testimony is unchartered territory: neither arbitral statutes, institutional rules nor the ever-expanding arbitral soft law addresses this important issue. This article reviews if and when arbitral tribunal should permit or reject such ‘out-of-scope’ testimony. The article establishes five clear-cut rules to deal with that issue.