Judgment of the Court (Second Chamber) of 21 April 2005 in Case C-186/04: Reference for a preliminary ruling from the Conseil d'État in Pierre Housieaux v Délégués du conseil de la Région de Bruxelles-Capitale (Directive 90/313/EEC — Freedom of access to information on the environment — Request for information — Requirement to give reasons in the event of refusal — Mandatory time-limit — Failure of a public authority to respond within the time-limit for reply — Implied refusal — Fundamental right to effective judicial protection)