The rules laid down in Title II shall apply to public contracts by means of which contracting authorities, including where they are acting as a contracting entity, establish or implement cooperation with a view to ensuring that the public services for which they are responsible are performed with a view to achieving the objectives which they have in common, where the following conditions are met:
1° The implementation of this cooperation is based solely on considerations of general interest;
2° The contracting authorities concerned carry out on the competitive market less than 20% of the activities concerned by this cooperation. This percentage of activities is determined under the conditions set out in Article L. 2511-5.