I am planning on the following DONE4 ex BKK:

BKK-HKGx-JFK-SFO-LHR-DXB-LHR-HKGx-SYD-AKL-HKG-BKK (Other MR segments not included here).

I confirmed with CX BKK that the above is permissible (incl LHR-HKGx-SYD).

Someone mentioned that it is not permissible if you are ex ASIA but theCX ticket agent said not true and I can even do USA as well.

I seems that the 2 Intercont sectors within the continent rule is really open to interuptation.