13The German Government points out that, under the Court's case-law, Article 59 of the EC Treaty (now, after amendment, Article 49 EC) precludes a Member State from requiring an undertaking established in another Member State and temporarily carrying out works in the first Member State to pay employers' contributions with respect to workers assigned to carry out those works, where that undertaking is already liable for comparable contributions in the State where it is established (Case C-272/94 Guiot [1996] ECR I-1905; see also Joined Cases 62/81 and 63/81 Seco and Desquenne & Girai v EVI [1982] ECR 223).
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