95It is true that, in accordance with the principle actori incumbit probatio, it is for the Council to establish, in the event of challenge, that the reasons relied on against the person concerned under criterion (b) are well founded, even though it is not required to produce before the Courts of the European Union all the evidence underlying those reasons (see, to that effect, judgment of 26 March 2026, UC v Council, C‑455/24 P, EU:C:2026:253, paragraph 115 and the case-law cited).