The final pattern of Nazi Party ranks was designed in 1938 by Robert Ley, who personally oversaw the development of Nazi Party insignia through his position as Reichs Organisation Leader of the NSDAP, and put into effect in mid-1939. The new insignia pattern was a vast overhaul of previous designs beginning with a standardized set of twenty eight Nazi Party ranks that were to be uniform across all levels of the Party. To denote membership in a particular "level" of the Nazi Party (local, county, regional, or national) collar tabs would display a particular color on which the actual rank insignia would then be displayed.