The Treaty on European Union follows well-established Community practice in treating third country nationals separately from EC nationals (i.e. nationals of Member States). Article 100c was introduced into the EC Treaty to empower the Council to enact measures regarding visa requirements for TC nationals engaged in 'international movement', meaning movement between the Community and a third country. Competence may also be acquired pursuant to Article K of the Treaty on European Union as regards 'internal movement', i.e., movement between Member States, by TC nationals as well as other aspects of international movement by such persons. Pending such acquisition. Article K envisages such matters being treated within the framework of cooperation in the fields of justice and home affairs. No attempt is made in these provisions to link treatment of TC nationals and the freedom of movement of EC nationals. Separate treatment might be thought to simply reflect the fact that in the case of TC nationals, the EC Treaty provides for no equivalent of the common customs tariff or the common commercial policy, which apply to trade in goods with third States. However, this justification may be of more formal than substantial significance. The absence of a common customs tariff or common cdmmercial policy for coal and steel products under the ECSC Treaty did not prevent the European Court from ruling that this Treaty secured free movement for coal and steel products originating in third States, once they had been properly admitted to one Member State. In any case, provision for the common customs tariff and the commercial policy in the EC Treaty did not in itself ensure that problems of separate treatment in the case of trade in goods were resolved. Indeed, such provision implied separate treatment of international trade and internal trade, and