I think this was already referenced in one of our Canadian rule discussions, but I'm not sure, so posting this bit of Canadian low power rules history:
Public Notice
Ottawa, 12 March 1992
Public Notice CRTC 1992-21
A REVIEW OF CRTC POLICIES GOVERNING THE USE OF LOW-POWER RADIO FREQUENCIES
A.INTRODUCTION
Public Notice
Ottawa, 12 March 1992
Public Notice CRTC 1992-21
A REVIEW OF CRTC POLICIES GOVERNING THE USE OF LOW-POWER RADIO FREQUENCIES
A.INTRODUCTION
In Decision CRTC 91-813 dated 23 October 1991, the Commission announced that it would undertake a full examination of its policies concerning the use of low-power frequencies. This public notice is the first step in this process;
In Decision CRTC 91-813 dated 23 October 1991, the Commission announced that it would undertake a full examination of its policies concerning the use of low-power frequencies. This public notice is the first step in this process;.... ..
https://crtc.gc.ca/eng/archive/1992/pb92-21.htm
Just bumping this up. Sometimes you need to go back in time to make sense of current regulations. I think this 1992 document could be a good start.
I've been tempted to dive in myself to try and figure RSS210 rules, but I have so many half finished part 15 research topics on my plate now that makes it a bad idea for me to go veering off into another country. I am looking forward to seeing any progress Artisian (and anyone else) makes for explaining the rules.