++++ 1 . Officials - Actions - Prior complaint through official channels - Formal conditions - Complaint drafted by the official' s lawyer - Signature of the person concerned - Not a substantial formality ( Staff Regulations, Art . 90 ) 2 . Procedure - Bringing of actions - Authority to act ad litem - Proof of authority not required ( Rules of Procedure, Art . 38(3 )) 3 . Officials - Leave - Annual leave - Carrying-over of unused leave - Detailed procedure for so doing not specified ( Staff Regulations, Art . 57; Annex V, Art . 4, first paragraph ) 4 . Officials - Leave - Annual leave - Withdrawal on the ground of undisputed absences due to illness - Not permissible ( Staff Regulations, Art . 57 )