Shortly after  railway workers with CP Rail arrived in Vancouver and many were Masons. They were used to the Canadian work used in Ontario and they applied to form a lodge using that ritual and it was accepted and Cascade Lodge No.12 was formed. This now gave British Columbia, three Rituals.
In 1906 a number of Australian Freemasons arrived in Vancouver and asked for permission to form a lodge to practice their Australian Ritual. It was approved and they became Southern Cross No.44 ...and the Grand Lodge of British Columbia acquired its forth ritual.
Note: This Australian Ritual had been produced by The Grand Lodge of New South Wales when it was formed in 1881. It was based on the English, Irish and Scottish Rituals (essentially all the same).
In 1893 the Grand Lodge of BC & Yukon decided all new lodges formed after 1893 should select one of the other three authorized rituals.
These "three" are the English Ritual as practiced by Victoria-Columbia No.1 in Victoria, the Ancient Ritual as practiced by Ashlar No.3 in Nanaimo or the Canadian Ritual practiced by Cascade Lodge No.12 in Vancouver.
[based on an article provided by Edwin J Lockhart, Senior
Grand Warden of The Grand Lodge of B.C. & Yukon
(source - EBee (GL of BC and Yukon 2020)
The Rituals of British Columbia
by Brother Bill Overy