61996A0146 Judgment of the Court of First Instance (Second Chamber) of 4 March 1998. Maria da Graça De Abreu v Court of Justice of the European Communities. Probationary officials - Appointment of a former member of the temporary staff - Maintenance of seniority in step - Principle of equality of treatment - Objection of illegality. Case T-146/96. European Court reports - staff cases 1998 Page IA-00109; II-00281