Alike in the civil courts, at a trial, an arbitral tribunal examines the case, analyzes the evidence, hears witnesses. However, there are a few significant differences. In arbitration, there is no limitation of evidence, although a presiding arbitrator has the power to fix a date after which no evidence would be accepted; the parties may agree the manner in which the proceedings to take evidence are to be conducted, e.g. they may decide to use services of private expert witnesses or even to have them heard by the arbitral tribunal.