No problem. Sorry for the 3 replies. I kept getting notified that my reply hadn't been sent, when actally, it had. You will not get this sort of information through Cathay. It comes from Letters of Agreement (LOA) signed by the respective Air Traffic authorities. We also have them between Hong Kong and Taipei. In fact any surrounding FIR.
These requirements find there way into the Manual of Air Traffic Control and that's where I got them from.
SeeMyToe