I believe someone lost their class 1 in the UK unexpectedly and was informed that they would be notifying the HKCAD as it was required, perhaps not the reason for the loss but that they could no longer hold a class 1. I assume it was on record that the person held a UK and HK class 1.
Well the CAD was umbilically connected to the CAA. When the CAD suspended my medical on the grounds of an unusual ECG it was the CAA who checked it out and reinstated my medical. 15 years later it was the CAA who suggested to the CAD that if it was up to them they would insist that I undertake an angiogram, not an insignificant test, so my medical was again suspended on a suspicion. Strangely enough the CAD would not entertain the opinion of the Australian DCA/DOT who had 20 years of records through their Aviation Medical Branch and had offered to provide those to the CAD.