‘A contract concluded exclusively between two or more contracting authorities shall fall outside the scope of this Directive where all of the following conditions are fulfilled:
-
the contract establishes or implements a cooperation between the participating contracting authorities with the aim of ensuring that public services they have to perform are provided with a view to achieving objectives they have in common;
-
the implementation of that cooperation is governed solely by considerations relating to the public interest; and
-
the participating contracting authorities perform on the open market less than 20% of the activities concerned by the cooperation.’