The Iustis Department is where all laws regarding the relationship between D.O.C.I.S. International and its members, the members among themselves and D.O.C.I.S. International and the outside world, are defined and regulated. It is also responsible for guaranteeing that newly introduced policies do not interfere with the freedoms of the members of the organization. The mandatory Dienstplicht for teenagers/young adults also falls under the Iustis Department.