Judgment_paragraph 84 · H. Jippes, Afdeling Groningen van de Nederlandse Vereniging tot Bescherming van Dieren and Afdeling Assen en omstreken van de Nederlandse Vereniging tot Bescherming van Dieren v Minister van Landbouw, Natuurbeheer en Visserij (C-189/01)

84In addition, it should be recalled that the legality of a Community act cannot depend on retrospective assessment of its efficacy. Where the Community legislature is obliged to assess the future effects of rules to be adopted and those effects cannot be accurately foreseen, its assessment is open to criticism only if it appears manifestly incorrect in the light of the information available to it at the time of the adoption of the rules in question (see, to that effect, Crispoltoni and Others, paragraph 43, and Case C-150/94 United Kingdom v Council [1998] ECR I-7235, paragraph 49).