JUDGMENT OF THE COURT OF FIRST INSTANCE (Fourth Chamber) of 5 February 1997 in Case T-211/95: Claudine Petit-Laurent v. Commission of the European Communities (Officials - Internal competitions - Notice of vacancy - Condition of being a temporary member of the temporary staff on the closing date for applications - Principle of protection of legitimate expectations - Principle of equal treatment - Duty to have regard for the welfare of officials - Action for damages)