Abstract. The paper concerns the computation of the graphical derivative and the regular (Frechet) coderivative of the normal-cone mapping related to C² inequality constraints under very weak qualification conditions. This enables us to provide the graphical derivative and the regular coderivative of the solution map to a class of parameterized generalized equations with the constraint set of the investigated type. On the basis of these results we obtain finally a characterization of the isolated calmness property of the mentioned solution map and derive strong stationarity conditions for an MPEC with control constraints.