JUDGMENT OF THE COURT OF FIRST INSTANCE (Fourth Chamber) of 17 December 1997 in Case T-225/95 Fotini Chiou v. Commission of the European Communities (Officials - Internal competition for movement of officials from Category C to Category B - Decision of the selection board noting the failure of candidates in the oral test - Consistency between the complaint and the application - Principle of equal treatment for men and women - Principle of non-discrimination - Assessment of the selection board)