Job-sharing was introduced into the Irish Civil Service in 1984. Job-sharers work half the number of hours of full-time workers and are paid the same hourly rate. The scale of annual incremental salary increases for job-sharers are parallel to that for full-time workers with each point on the job-sharers scale representing 50% of the corresponding point on the full-time scale. 98% of job-sharers in the Irish Civil Service are women. According to the national referring tribunal a job-sharer can acquire the same experience as a full-time worker. When H and S transferred from job-sharing to full-time work they were initially assimilated to the same point on the full-time incremental scale as that which they had occupied on the job-sharers' scale. They were both subsequently reclassified at a lower point on full-time scale on the grounds that two years on the job-sharers' scale represented one year on the full-time scale. The questions posed to the ECJ by the Labor Court in Ireland arose from the decision by H and S to contest their reclassification. The Court took the view that workers who transferred from job-sharing, where they worked 50% of full-time hours and were paid 50% of full-time pay, to full-time work, were entitled to expect both the number of hours that they worked and the level of their pay to increase by 50%, in the same way as workers converting from full-time work to job-sharing would expect these factors to be reduced by 50%, unless a difference of treatment can be justified. Such development did not occur in this case, with the result that, as former job-shares are paid less than twice their job-sharing salary, their hourly rate of pay as full-time workers is reduced. Within the category of full-time workers, therefore, there is unequal treatment, as regards pay, of employees who previously job-shared, and who regress in relation to the position which they already occupied on the pay scale. In so finding, the Court observed that the use of the criterion of actual time worked during the period of job-sharing fails to take account, inter alia, of the fact that job-sharing is a unique category of work, given that it does not involve a break in service, or of the fact that a job-sharer can acquire the same experience as a full-time worker. Furthermore, a disparity is retroactively introduced into the overall pay of employees performing the same functions so far as both the quality and quantity of the work performed is concerned. In such a case, application of provisions of the kind at issue before the national tribunal result in discrimination against female workers which must be treated as contrary to Article 119 of the Treaty. The Court of Justice concluded that it would be otherwise only if the difference of treatment which was found to exist between the two categories of worker were justified by objective factors unrelated to any discrimination on the grounds of sex. It added that it is for the national tribunal to decide if any such objective factors exist.
Case C-243/95, Hill and Stapleton v. Revenue Commissioners  ECR I-3739
European Court of Justice