47Second, as regards Article 15(3) of Regulation No 423/2007 more specifically, it must be borne in mind that the principle of effective judicial protection means that the European Union authority which adopts an act imposing restrictive measures against a person or entity is bound to communicate the grounds on which it is based, so far as possible, either when that measure is adopted or, at the very least, as swiftly as possible after it has been adopted in order to enable those persons or entities to exercise their right to bring an action (see, to that effect, Kadi and Al Barakaat International Foundation v Council and Commission, paragraph 336).
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