Case C-103/06: Judgment of the Court (Third Chamber) of 3 April 2008 (reference for a preliminary ruling from the Tribunal des affaires de sécurité sociale de Paris (France)) — Philippe Derouin v Union pour le recouvrement des cotisations de sécurité sociale et d'allocations familiales de Paris — Région parisienne (Urssaf) (Social security for migrant workers — Regulation (EEC) No 1408/71 — Self employed workers living and working in France — General social contribution — Social debt repayment contribution — Account taken of income received in another Member State and taxable in that State under a double taxation treaty)