Directeur régional de la sécurité sociale de Nancy v. Auguste Hirardin e Caisse régionale d'assurance maladie du Nord-Est, Case C-112/75, CJEU, 8 April 1976

Calculation of the retirement pension of a worker residing in France but a citizen of another Member State. 
 

Art. 177 EEC Treaty
Art. 48 EEC Treaty
Art. 51 EEC Treaty
 

The principle of equal treatment of workers, crystallised in Community law, implies that national rules which have the effect of refusing the advantage granted are not valid in relation to a worker residing in France and a citizen of another Member State. to French workers, as regards the inclusion, in the calculation of the old-age pension, of the insurance periods completed in Algeria.