41Consequently, since Regulation No 1269/1999 does not define ‘irregularity’, the meaning and scope of that phrase must, as the Court has consistently held, be determined by considering its usual meaning in everyday language, while also taking into account the context in which it occurs and the purposes of the rules of which it is part (see judgment in Diakité, C‑285/12, EU:C:2014:39, paragraph 27 and the case-law cited).
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