Case 141/88: Reference for a preliminary ruling by the Cour de Cassation, Chambre Sociale, of the French Republic, by judgment of that court of 4 May 1988 in the case of Caisse Nationale d'Assurance Vieillesse des Travailleurs Salaries Region de Paris [National Old-Age Insurance Fund for Employed Persons, Paris Region] and Alain Jordan, in the presence of the Direction Regionale des Affaires Sanitaires et Sociales Poitou-Charentes [Poitou-Charentes District Headquarters for Health and Social Security Matters]