Direct applicability is often confused with the doctrine of direct effect. This confusion is perhaps explained by reference to the treatyprovision governing regulations which provides that they, and only they, have direct applicability within the member states. The early jurisprudence of the ECJ suggested that 'direct effect' was a consequence of direct applicability as it was thought that the drafters of the original treaty intended regulations, and only regulations, to be directly effective. However, the expansion of the doctrine of direct effect to include directives and other measures served to create a distinction between direct applicability and direct effect. Direct applicability is now taken to mean that regulations require no domesticimplementation - if direct effect was only ever intended to be a consequence of direct applicability then the relationship has been severed by a series of ECJ cases.