The aim of this study is to propose an investigation related to the limits of private autonomy, taking into account the structure of the right to someone’s free use of his(her) own body as well as the possibility of the usage of bionics selfdevelopment of human body. Once a theoretical reference is identified in order to relate the corporal element to a normative concept of person, the protection of one’s personality may be directly referred to the protection of a personal identity. In this vein, a subjective right to one’s own body is proposed in analogy to the concept of sovereignty. Defining the autonomy in accordance with the dialectical relation between private and public autonomy, the criteria used to justify the intervention in the exercise of autonomy are based on two premises: i) the act of intervention is restricted to situations in which there are collateral effects of the specific autonomous act in other spheres of sovereignty and in the relational space and ii) it is possible to intervene in any sphere of free will if and only if the norms proposing the intervention can be the product of consensus of all participants in a rational discourse. Asserting that there is no identity at all between a person and the biological status of being human, it is logical to conclude that, even if the self is completely change by any kind of bionics technology, he or she will still remain a person. Even though the fusion of man and machine is within his (her) sphere of sovereignty, normative intervention is permitted in case of invading the sphere of sovereignty of another agent. In addition, so as to protect the relational space among different selves, normative intervention ought to be limited to the regulation of the use of upgrades. The purpose here is to preserve the personal autonomy of the agent as well as the autonomy and other interests from those not modified by the upgrades.