52As regards, next, the concepts of economic activities and the provision of services within the meaning of Articles 2 and 59 of the Treaty respectively, it must be pointed out that those concepts define the field of application of one of the fundamental freedoms guaranteed by the Treaty and, as such, may not be interpreted restrictively (see, to that effect, Case 53/81 Levin v Staatssecretaris van justitie [1982] ECR 1035, paragraph 13).
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