The evidence adduced at the substantive hearing or trial of an arbitration may either be (1) in the form of documents or other physical material (such as the property or “thing” over which the parties are in dispute) or (2) in the form of live evidence from factual or expert witnesses. The time between the issue of the tribunal's Procedural Order No. 1 and the substantive hearing or trial of the arbitration will largely be taken up by interlocutory applications and by the process of gathering and preparing the evidence to be adduced at the substantive hearing. Interlocutory applications were the subject of the previous chapter. This chapter will focus on the process of getting the evidence ready to be presented at trial.