The categories of departments or units in which the judicial police officers and agents referred to in sections II and III of this chapter carry out their usual duties, the procedures for creating these departments or units and their territorial jurisdiction criteria are determined by decree in the Council of State issued on the report of the Minister of Justice and the Minister concerned. The territorial jurisdiction of these departments or units is exercised, according to the distinctions provided for by this decree, either over the whole of the national territory, or over one or more defence zones, or parts thereof, or over the whole of a département.