Consisting at first of paid agents and a few hundred unpaid informants scattered across Germany, the SD was quickly professionalized under Heydrich, who commissioned National Socialist academics and lawyers to ensure that the SS and its Security Service in particular, operated "within the framework of National Socialist ideology."[82] Heydrich was given the power to select men for the SS Security Service from among any SS subdivisions since Himmler considered the organization of the SD as important.[83] On September 1939, the SD was divided into two departments, the interior department (Inland-SD) and the foreign department (Ausland-SD), and placed under the authority of the Reich Main Security Office (RSHA).[84]