Looking at all of the info out there, I found this from AOPA:
In a Jan. 11 webinar, Nav Canada announced its proposed 1090 MHz extended squitter (1090ES) ADS-B Out performance requirements. Phase 1, which would be implemented Jan. 1, 2021, would include all airspace over 18,000 feet. Phase 2, beginning Jan. 1, 2022, would add Class B airspace which, in Canada, extends from 12,500 feet msl up to but not including 18,000 feet msl. Phase 3 is less defined, expanding ADS-B as needed to “specific controlled airspace, en route or at an airport, starting no sooner than 2023.”
I don't care to fly above 10,000 feet ever, so it looks like I'll be fine until at least 2023, which is the soonest they may add more ads-b requirements, but maybe not.
Given how much can change in 3 years, and how much I really dislike governments tracking me, I'm going to go ahead with 978mhz.



