The interpretation of the law: act of knowledge or act of will?

The issue of interpretation of the law has enjoyed increased attention from the legal doctrine and practice during the centuries. Both the natural-law school and the normative theory with its positivist version have pleaded to define the interpretation as an activity that focuses on the significance of the norm, the act or human conduct. The divergence occurs in the case of the answer to the question whether the meaning is only discovered or it is determined by the one who interprets the law. Analyzing the theses of the French authors about interpretation, first of all of the followers of realistic theory, we come to the conclusion that it is an act of knowledge, but to become mandatory, that is to produce legal effects, the will of the body that applies and interprets the law is needed and in this case the judge, through good faith, professionalism and common sense, is responsible for his/her decision. How important is the will of the body that interprets the law proves the case study: Ukraine and Moldova.