1 . OFFICIALS - RECRUITMENT - COMPETITION - SELECTION BOARD - REFUSAL TO ADMIT TO A COMPETITION - INACCURATE ASSESSMENT OF A DOUBTFUL ADMINISTRATIVE SITUATION - DUTY OF THE SELECTION BOARD TO INVESTIGATE OF ITS OWN MOTION - ABSENCE - UNLAWFULNESS OF THE DECISION ( STAFF REGULATIONS , ANNEX III , ART . 5 ) 2 . PROCEDURE - COSTS - EACH PARTY TO PAY ITS OWN COSTS - EXCEPTIONAL CIRCUMSTANCE ( RULES OF PROCEDURE , ART . 69 ( 3 ), FIRST SUBPARAGRAPH )