“Article 4 of Council Directive 79/7/EEC of 19 December 1978 on the progressive implementation of the principle of equal treatment for men and women in matters of social security precluded legislation of a member state which required a proportionally greater contribution period from part-time workers, the vast majority of whom were women, than from full-time workers for the former to qualify, if appropriate, for a contributory retirement pension in an amount reduced in proportion to the part-time nature of their work.”
WLR Daily, 22nd November 2012
Source: www.iclr.co.uk