36It should be recalled that the objectives pursued by Directive 90/434 must be achieved in national law in compliance with the requirements of legal certainty. To that end, the Member States have an obligation to establish a system of time-limits that is sufficiently precise, clear and foreseeable to enable individuals to ascertain their rights and obligations (see, by analogy, Case C-406/08Uniplex (UK) [2010] ECR I-817, paragraph 39 and the case-law cited). It is for the national court to establish whether those requirements are complied with.