Thinking more about it, I assume that BC has now adopted the federal requirements. They did that with the electrical code.
So it may be mentioned here. https://laws-lois.justice.gc.ca/eng/regulations/C.R.C.%2C_c._1038/page-11.html#docCont
I suppose that if you can't find it, you can do what you think is right. Some of the trucks you see on highways these days look like Christmas on wheels.
