Hauptamt II); head of section: Werner Blankenburg Hauptamt III: Gnadenamt für Parteiangelegenheiten (Pardon Office for Party Affairs); chief: Hubert Berkenkamp; later from 1941 forward: Kurt Giese. Hauptamt IV: Sozial- und Wirtschaftsangelegenheiten (Social and Economic Affairs); chief: Heinrich Cnyrim. Hauptamt V: Internes und Personal (Internal Affairs and Personnel Matters); chief: Herbert Jaensch. After 1941, Bouhler's influence and that of the KdF declined and he was largely disempowered by Martin Bormann. Eventually the KdF was absorbed into the Reich Chancellery headed by Lammers during the war. Action T4 Hauptamt II officials under Viktor Brack played a vital role in organizing the killing of mentally ill and physically handicapped people in the Action T4 "euthanasia" programme, especially the child "euthanasia" from 1939. By a (backdated) decree of 1 September, Hitler appointed Bouhler and his personal physician Karl Brandt to manage the euthanasia program, where they would oversee the murder of physically and/or mentally disabled persons. The implementation of the killing operations were left to subordinates such as Brack and SA-Oberführer Werner Blankenburg. Besides Hitler's Chancellery, only a handful of personnel were privy to the inner workings of the euthanasia program so as to maintain secrecy, which is part of the reason Hitler chose Bouhler, as he knew the KdF "could direct the killings without involving too many people and without becoming too visible." In accordance with the Chancellery-directed plan, physicians were required to report any newborn with abnormalities or congenital defects to the local health department; doctors were likewise required to register children under three-years suffering from any such conditions. During the killing phase related to euthanizing children, the KdF chose the cover title, Reich Committee for the Scientific Registration of Severe Hereditary Ailments, which only actually existed on paper; code names were also employed by members of the KdF for matters dealing with euthanasia. To provide some additional semblance of legitimacy to the operation, three doctors or "certifiers" also had to concur over any diagnosis before a "merciful death" could be administered, which included the final signature of a psychiatrist—all of which really boiled down to the economic considerations regarding the person's ability to work. To execute the deportations, the Gemeinnützige Krankentransport GmbH camouflage organization was established, residing on Tiergartenstraße No. 4. Just like earlier euthanasia operations, secrecy was again paramount, as Hitler explicitly told Bouhler concerning Aktion T4, "the Führer's Chancellery must under no circumstances be seen to be active in