The Prague Rules were adopted in December 2018. Their scope covers the entire arbitral procedure. In their provisions on the administration of evidence, the Prague Rules aim to constitute an openly civilist alternative to the IBA Rules on the same subject. The Prague Rules defend an interventionist conception of the role of arbitrators as well as a restricted use of documentary evidence and the most limited possible use of testimonial evidence. On many points, the solutions advocated by the Prague Rules do not contradict the IBA Rules in their content but in their application. On other points, the Prague Rules are totally original, in particular with regard to the arbitrators’ ability to give their first impressions of the probative value of the evidence produced by the parties. This article aims to summarize the debate generated by the Prague Rules.