39Secondly, as to the principle of the protection of legitimate expectations, it is clear from the Court’s settled case-law that any economic operator on whose part the national authorities have promoted reasonable expectations may rely on the principle of the protection of legitimate expectations. However, where a prudent and circumspect economic operator could have foreseen that the adoption of a measure is likely to affect his interests, he cannot plead that principle if the measure is adopted. Furthermore, economic operators are not justified in having a legitimate expectation that an existing situation which is capable of being altered by the national authorities in the exercise of their discretionary power will be maintained (see, inter alia, judgment in Plantanol, C‑201/08, EU:C:2009:539, paragraph 53).
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