In the introductory part of the paper there are discussed the most basic characteristics of both public and private sectors, with an emphasis put on the importance of their mutual influencing. Then, we continue our exposure with a display and analysis of the criminal act “abuse of power“, the incrimination sanctioning only the conduct of the official person (no longer of the person responsible, as it was the case up to the changes and supplements of our Criminal law from 24th December 2012). However, this incrimination is still controversial, because it is not precisely defined, and thus it covers a very wide range of behaviours, which represents the violation of the principle of legality and leads to arbitrariness jeopardizing the principle...