Aussies in HK-HECS debt

[EngineOut]

What happens to your HECS debt when you move to HK? I have heard rumours that the ATO cancels it after a certain number of years living overseas. Is that true?? Or too good to be true?

I had a quick look on the ATO website but did not find much specific-it only talked about being overseas for 6 months.

Thanks

EO