47It must be acknowledged that the penal nature of the anti-doping rules at issue and the magnitude of the penalties applicable if they are breached are capable of producing adverse effects on competition because they could, if penalties were ultimately to prove unjustified, result in an athlete's unwarranted exclusion from sporting events, and thus in impairment of the conditions under which the activity at issue is engaged in. It follows that, in order not to be covered by the prohibition laid down in Article 81(1) EC, the restrictions thus imposed by those rules must be limited to what is necessary to ensure the proper conduct of competitive sport (see, to this effect, DLG, paragraph 35).
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