123As regards the third condition, it must be noted that it has two aspects: first, the limitations on freedom of expression liable to result from the restrictive measures at issue must be necessary and proportionate to the aim pursued and, second, the essence of that freedom must not be impaired (see, by analogy, judgment of 15 June 2017, Kiselev v Council, T‑262/15, EU:T:2017:392, paragraph 84). As regards the first aspect, it must be recalled that the principle of proportionality, as one of the general principles of EU law, requires that measures adopted by the EU institutions do not exceed the limits of what is appropriate and necessary in order to attain the objectives pursued by the legislation in question. Consequently, when there is a choice between several appropriate measures, recourse must be had to the least onerous, and the disadvantages caused must not be disproportionate to the aims pursued (judgment of 15 June 2017, Kiselev v Council, T‑262/15, EU:T:2017:392, paragraph 87).