32The Commission is not required to demonstrate exhaustively that there are insufficiencies in the checks carried out by the national authorities or that there are irregularities in the data submitted but to adduce evidence of serious and reasonable doubt on its part regarding those checks or those data (judgment of 20 September 2001, Belgium v Commission, C‑263/98, EU:C:2001:455, paragraph 36, and 8 May 2003, Spain v Commission, C‑349/97, EU:C:2003:251, paragraph 47).
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