41Moreover, it is settled case-law that all EU acts must be interpreted in accordance with primary law as a whole, including the principle of equal treatment, which requires that comparable situations must not be treated differently and that different situations must not be treated in the same way unless such treatment is objectively justified (judgment of 19 November 2009, Sturgeon and Others, C‑402/07 and C‑432/07, EU:C:2009:716, paragraph 48).
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