When were the 35 sub-divisions lumped into 3 divisions, Eastern, Western and Southern. Which subs went where?
First of all, Divisions have existed with Sub-divisions within. You have to be specific about time frame. Secondly, there have been and are more Divisions than just Eastern, Western and Southern; there are also Northern, Southwestern, Central, River and Cape as examples of more Divisions. The structure for the most part is revealed in the Divisions and Sub-Divisions structure in this forum.
By 1980 there were just three divisions: Eastern, Southwestern, Southern. In the early 1960s there were seven plus QA&P. When did the concentration into three take place? One time or in a series of steps?