101So far as the necessity of the measures at issue is concerned, it should be noted that alternative and less restrictive measures, such as a system of prior authorisation or an obligation to justify, a posteriori, how the funds transferred were used, are not as effective in achieving the goal pursued, namely putting pressure on the supporters of the Syrian regime which is persecuting the civilian population, particularly given the possibility of circumventing the restrictions imposed (see, by analogy, Al-Aqsa v Council, paragraph 125).