73In this regard, the principle of proportionality referred to in Article 13 of Directive 2009/28, which is one of the general principles of European Union law, requires that measures adopted by Member States in this field do not exceed the limits of what is appropriate and necessary in order to attain the objectives legitimately pursued by the legislation in question; 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 (see, inter alia, Case C-331/88 Fedesa and Others [1990] ECR I-4023, paragraph 13, and Joined Cases C-133/93, C-300/93 and C-362/93 Crispoltoni and Others [1994] ECR I-4863, paragraph 41).
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