The process of European legal integration has long been understood to engage the workings of domestic legal orders, EC law and, to a lesser extent, the law of the ECHR. In general terms, the relationship between these bodies of law has been characterised as involving the direct and indirect interchange of principle and practice across jurisdictions. An example of direct interchange is found in the EC law requirement that national courts give effect to rules emanating from the EC legal order in all cases raising EC law issues. The indirect form occurs in disputes which do not raise EC law issues but which see national courts voluntarily borrow from their experience within the EC legal order by way of developing the domestic legal system. Likewise, national courts and the European Court of Justice have relied upon the law of the ECHR, a “foreign” body of rules, in developing their respective legal orders.