63Furthermore, the principle of respect for the rights of the defence is a fundamental principle of EU law. That principle would be infringed if a judicial decision were to be based on facts and documents of which the parties themselves, or one of them, have not been able to take cognisance and in relation to which they have not therefore been able to formulate an opinion (judgment of 12 November 2014, Guardian Industries and Guardian Europe v Commission, C‑580/12 P, EU:C:2014:2363, paragraph 30 and the case-law cited).
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