[seidoger]

I know that Canada (where I live) has introduced the Air Passenger Protection Regulations[1] in 2019 (and making it better since then), which does have "tarmac delays" clauses[2]. IIRC, we modelled it after EU regulations.

[1] https://rppa-appr.ca/eng

[2] https://rppa-appr.ca/eng/right/tarmac-delays