67It should be noted, in that regard, that the possibility of invoking a plea of illegality in connection with a dispute between a staff member and an institution is subject to several conditions of admissibility: with regard to an incidental legal remedy, this requires that (i) an independent action has been brought, (ii) that it is brought against a decision adversely affecting the official, (iii) that this independent action is admissible, (iv) that the staff member was not able to seek annulment of the act of general application that served as the basis for the decision adversely affecting him, and (v) there is a sufficient connection between the act of general application and the contested individual decision.
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