The following pages are intended to form a Chief Adjudicator’s Handbook. They are an attempt at capturing many of the practices that have developed, either ad hoc or by Council decision, as the World Schools Debating Championships have grown in recent years. In particular, since 1999 we have seen an increasing need to separate the duties of Chief Adjudicator (CA) and Convenor – and their teams - as the scope of the Championships now requires dedicated event management.