Seen as a restriction on the exercise of certain rights, expulsion must conform to the rules established in international law for such cases: it must serve a legitimate purpose and satisfy the criterion of proportionality between the interest of the State and that of the individual.
Dans la seconde hypothèse, l'expulsion doit se conformer aux règles de droit international applicables en la matière, à savoir viser un but légitime et respecter le principe de proportionnalité entre l'intérêt de l'État et celui de l'individu.