Sunset The new regulations are indeed like that, but it seems there isn't a unified coordination mechanism for this. I was worried that after my license in the 9th district expires, my callsign might be reassigned to someone else, causing confusion. When I called Xi'an 無委 (Wu Wei), I asked them about this, and they said that there is currently no nationwide database of this kind. They took down my information and passed it on to their superiors.