Dans d'autres, toutefois, des difficultés subsistent, notamment dans: - le domaine de la libre circulation des marchandises, les dossiers liés à des obstacles non-tarifaires (art. 30 et suivants) - le domaine des marchés publics, on relève l'accroissement important des plaintes pour non-respect des règles communautaires, ainsi que le doublement des procédures d'infraction.
Nevertheless, difficulties remain, particularly in the following areas: - non-tariff barriers to the free movement of goods (Article 30 et seq.); - public procurement, where the number of complaints about failure to comply with Community law rose sharply and the number of infringement proceedings doubled, partly because of an expansion in the volume of Community legislation; - VAT, where cases of failure to comply with Community law persist, despite the infringement proceedings that have been pending for years.