I had a brief message from a friend of mine and I asked about this, he isn't 100% sure as he had been out, however he believes what they were going for is not a quota but a "quota" in that at the end of the board when they look at the selections and identify where they are from that the breakdown would look like above, and if not then the NTAG's need to do a better job.
There was something like this tried years and years ago and it didn't go well, basically you could have one region with the top 30 candidates and another with the bottom 30 and the region with the top 30 has a bunch of people shafted, it all kind of goes against the "best qualified" idea.