And there is appears to be some activity with the US. As shown at the links below Brian Ernewein who is the General Director of the Tax Policy Branch at Finance Canada traveled to the US twice over the summer once in June and once in August.
The first meeting was with generic US Government officials(which I take to include both Treasury and IRS and possibly FINCEN) and the second was with US Treasury Staff. About a week after Ernewein’s June meeting the new expat super minnow program was announced. I don’t know whether or nor this was a coincidence. Ernewein also June went to a big OECD conference in Paris as did one of the Assistant Commissioner’s at CRA. I will try to find a picture or video of Ernewein so you can put a picture to the name. I will note while he is high up he is not at the level of Deputy Minister or Assistant Deputy Minister which are filled by Michael Horgan and Louise Levonian respectively. Links below:
My personal opinion is truly serious negotiations need to involve either Levonian or Michael Horgan. By definition Brian Ernewein I doubt met anyone higher than Manal Corwin, Emily McMahon, Michael Plowgian etc.