The phenomenon of diffusion of agreements among the public Administrations regarding the action and organization of public authorities has already been highlighted for a long time and by many people as well, finding out the basis- upon the most attentive doctrinal speculations carried out in this subject- in the ordination’s transformation, in pluralistic and autonomous sense of its meaning. As a mater of fact, the roots of the increase of using the conventional modules in relations among the public subjects, there would be the affirmation of effective and equal (by nature) pluralism, attributable either to the passage to, so called, multi-class State, or to the effects of autonomous launch that had led to the gradual and progressive recog...