[2006] EUECJ C-290/03, 4 May 2006. Considers a number of matters arising under Directive 85/337/EEC, Arts 1(2), 2(1) and 4(2); whether a decision as to planning consent was purely a matter for national law, whether an environmental impact assessment was required if, at the time approval for reserved matters was sought, it was clear that the project might have significant effects on the environment, and whether national law could preclude an authority from requiring that such an assessment be carried out at a later stage of the planning process. "Held" for the purposes of Directive 85/337/EEC, the classification of a decision as a development consent must be carried out pursuant to national law in a manner consistent with EC law. Arts 2(1) and 4(2) had to be interpreted as requiring an environmental impact assessment to be carried out, if in the course of granting a staged consent, it became apparent, during the second stage, that the project was likely to have significant effects on the environment.