from https://www.amezz.com/cnbcstairref.htmlplease who the afore mentioned city codes from verifiable sources.
National Building Code of Canada: Section 9.8 - Stairs, Ramps and Handrails
Table 9.8.3.1. Rise, Run and Tread Depth of Stairs
Forming Part of Sentence 9.8.3.1.(1)
[TABLE="class: zstripe"]
[TR]
[TH]Stair Type
[/TH]
[TH="colspan: 2"]Rise, mm
[/TH]
[TH="colspan: 2"]Run, mm
[/TH]
[/TR]
[TR]
[TD][/TD]
[TD]max.
[/TD]
[TD]min.
[/TD]
[TD]max.
[/TD]
[TD]min.
[/TD]
[TD]max.
[/TD]
[TD]min.
[/TD]
[/TR]
[TR]
[TD]Service(1)
[/TD]
[TD]no limit
[/TD]
[TD]125
[/TD]
[TD]355
[/TD]
[TD]no limit
[/TD]
[TD]355
[/TD]
[TD]no limit
[/TD]
[/TR]
[TR]
[TD]Private(2)
[/TD]
[TD]200
[/TD]
[TD]125
[/TD]
[TD]355
[/TD]
[TD]210
[/TD]
[TD]355
[/TD]
[TD]235
[/TD]
[/TR]
[TR]
[TD]Public(3)
[/TD]
[TD]200
[/TD]
[TD]125
[/TD]
[TD]355
[/TD]
[TD]230
[/TD]
[TD]355
[/TD]
[TD]250
[/TD]
[/TR]
[/TABLE]
Notes to Table 9.8.3.1.:
(1) Service stairs serve areas only used as service rooms or service spaces.
(2) Private stairs are interior stairs within dwelling units and exterior stairs serving a single dwelling unit
(3) Public stairs are all stairs not described as service stairs or private stairs.
If you do not consider this to be a verifiable source you can purchase your very own copy of the national building codes from here https://www.nationalcodes.nrc.gc.ca/eng/nbc/index.html
Yes, I realize that these are current codes but the rise/run of stairs has not changed. If I had to prove it in court (which it seems you want me to do). I could probably get ahold of a copy of codes from 30+ years ago and it would have the same chart in it.
Hope that helps