Brevi note sul ritorno del principio di legalità in una decisione del T.A.R. Lombardia sulle delibere ARERA in materia di sistema tariffario dei rifiuti

This paper aims to analyse the decision taken by the Region Administrative Court of Milan regarding the interdiction of ARERA to invoke the implied powers theory, to avoid the exercise of a faculty already practiced by another administrative apparatus. This judgement allows to reflect on one hand on the adversities to define boundaries within which the independent authorities can expand their actions, and on the other hand on the maintenance of the rule of law value.