 In May 1940 it was reported that the area 's headquarters building would change from " Mont <unk> " in Point Piper to the mansion " <unk> " nearby . Cole handed over command of Central Area to Air Commodore Bill Anderson in December 1940 . By August 1941 , the RAAF 's expanding instructional program necessitated the establishment of overarching training organisations on a semi @-@ functional , semi @-@ geographical basis . Accordingly , No. 2 ( Training ) Group was formed in Sydney , taking responsibility for the training units then under Central Area , which was disbanded . Control of other Central Area units was " divided as convenient " , according to the official history of the war , between Northern and Southern Area <unk> . 
