Judgment_paragraph 233 · PT v European Investment Bank (T-573/16)

233It must be noted that legal certainty, an integral part of which is the principle of foreseeability (see, to that effect, judgment of 11 May 2017, Deza v ECHA, T‑115/15, EU:T:2017:329, paragraph 135 and the case-law cited), is a general principle of EU law. That principle seeks to ensure that situations and legal relationships arising under EU law remain foreseeable (see judgment of 4 May 2016, Andres and Others v ECB, T‑129/14 P, EU:T:2016:267, paragraph 35 and the case-law cited) and requires that all measures of the administration which have legal effects must be clear and precise so that the parties concerned may be able to ascertain unequivocally what their rights and obligations are and to take steps accordingly (see, to that effect, judgment of 27 January 2016, DF v Commission, T‑782/14 P, EU:T:2016:29, paragraph 45 and the case-law cited). That requirement applies in particular where the measure at issue may have adverse effects on the parties concerned (see, to that effect, judgment of 11 May 2017, Deza v ECHA, T‑115/15, EU:T:2017:329, paragraph 135).