Abstract
Subjective rights enjoy limited import in Kelsenian theory for whereas the concept of duty underlies every legal norm, that of rights is merely possible and only emerges when the imposition of the sanction attached to the breach of the duty is made dependent upon a subject's will to bring legal action. The presence of secondary norms establishing certain duties of medical professionals on informed consent displays the existence of correlative reflex rights of patients. Yet, together with secondary norms, Western legal systems typically institute norms of competence enabling patients to take legal action when those duties correlative to their reflex right to informed consent have been infringed. Thus, informed consent constitutes a set of subjective legal positions of patients and medical professionals. Despite its excessive formalism and questionable neutrality, the Kelsenian approach permits to define and clearly distinguish patients' genuine rights from mere aspirations devoid of legal basis.