22In this connection, it is settled case-law that Directive 98/34 is designed to protect, by means of preventive monitoring, the free movement of goods, which is one of the foundations of the Community and that this control serves a useful purpose in that technical regulations falling within the scope of that directive may constitute obstacles to trade in goods between Member States, such obstacles being permissible only if they are necessary to satisfy compelling requirements relating to the public interest (see, to that effect, Case C-194/94CIA Security International [1996] ECR I-2201, paragraph 40, and Case C-226/97Lemmens [1998] ECR I-3711, paragraph 32).