In judicial review of decisions of administrative authorities courts generally aim towards grounding a judgment on substantively true facts. Such a substantive truth is usually understood as meaning ’that which happened’. But how can true facts be established if the facts have not yet occurred and what implications does this have for judicial review in administrative procedures? In this article this question will be analysed by taking the Dutch Administrative Court’s review of merger decisions of the Dutch Competition Authority - using a substantively close copy of the European merger control assessment framework - as subject of analysis. Judicial review of the substantive assessment in merger control, including the prospective analysis involved and taking into account complexities of economic evidence, will be analyzed and set against the general aim of establishing substantive truth of facts.

This article on the usefulness of a general codification of administrative law forms the closing contribution of a NALL-special. In this special, various authors have reflected on the successfulness of a broad codification process in 1998, which introduced rules on the notification of decisions, policy rules, subsidies, enforcement and supervision of administrative authorities in the Dutch General Administrative Law Act (GALA). The editors asked the contributors whether the objectives of the rules introduced were met and how the rules turned out to function in practice. In this overarching article, the NALL-editors reflect on the general lessons to be learned for the GALA-legislator. In these lessons they also take into consideration the initiatives for a law of administrative procedure of the European Union.