37It follows, however, from the Court's case-law that national measures liable to hinder or make less attractive the exercise of fundamental freedoms guaranteed by the Treaty must fulfil four conditions: they must be applied in a nondiscriminatory manner; they must be justified by imperative requirements in the general interest; they must be suitable for securing the attainment of the objective which they pursue; and they must not go beyond what is necessary in order to attain it (see Case C-19/92 Kraus ν Land Baden-Württemberg [1993] ECR I-1663, paragraph 32).
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