Case C-404/13, The Queen, on the application of Client Earth v Secretary of State for the Environment, Food and Rural Affairs EU:C:2014:2382, OJ C – 26 of 26.1.2015, p. 6.
When a Member State finds that the limit values cannot be respected before the deadline fixed by the Air Quality Directive and wishes to postpone that deadline for a maximum of five years, that Member State is required to make an application for the postponement of the deadline by drawing up an air quality plan demonstrating how those limits will be met before the new deadline (official headnote).