This tip was suggested by Marnie Bailey of Fasken Martineau DuMoulin LLP.
Unlike the vast majority of Canadian regulations, you can’t find a consolidated version of the Transportation of Dangerous Goods Regulations on the federal Justice Laws website; instead the Justice Laws website refers you to Transport Canada’s website. While Transport Canada has a copy of the current consolidated version, it does not make previous versions available on its website, so what is a law librarian to do? Head to the Wayback Machine of course!
There is a lovely capture of how the Regulation read right before a major 2016 amendment; this removed a frequently referred to table from part 8.1.