Ok, completely understood. I'm not worried about all my existing changes since as I wrote, I do base my changes off personal knowledge and manual inference work (you'll find that many residential buildings I work on don't have addresses labelled properly in any other dataset). I wouldn't classify my work as "importing data". All 3rd party datasets are sometimes used for corroboration.

You raise an interesting idea about reaching out to the data owners. I'll seriously think about it. Is there anywhere I can read about the talks with TA municipality to see what the process looked like?