++++ 1.Officials - Actions - Interest in bringing an action - Decision on contingent pension rights ( Staff regulations, Art . 91 ) 2.Officials - Actions - Act adversely affecting an official - Criteria - Statement of reasons on which the act is based ( Staff regulations, Arts 90 and 91 ) 3.Officials - Actions - Act adversely affecting an official - Concept - Preparatory act - Exclusion ( Staff regulations, Arts 90 and 91 ) 4.Officials - Actions - Prior complaint - Prescribed periods - Mandatory nature ( Staff regulations, Arts 90 and 91 )