This nonsense about the fine differences of C verses D is really just nitpicking codswallop.
Bloggsie,
I will translate that for you as follows: " ICAO airspace management principles based on separation assurance risk management principles and appropriate CNS/ATM resources is really just nitpicking codswallop".
Just the balanced and considered "professional" opinion we have come to expect.
Tootle pip!!
PS: You should have a look at the whole Los Angeles basin, not just the little bit a few miles around KLAX, you ought to be surprised. After all, it only about the size of the Sydney Basin/County of Cumberland.