From the Canada Gazette
Regulations Amending the Transportation of Dangerous Goods Regulations
:

Whereas, pursuant to subsection 30(1) of the Transportation of Dangerous Goods Act, 1992 (see footnote a), a copy of the proposed Regulations Amending the Transportation of Dangerous Goods Regulations, substantially in the form set out in the annexed Regulations, was published in the Canada Gazette, Part I, on September 30, 2006 and a reasonable opportunity was thereby afforded to interested persons to make representations to the Minister of Transport, Infrastructure and Communities with respect to the proposed Regulations;

Therefore, Her Excellency the Governor General in Council, on the recommendation of the Minister of Transport, Infrastructure and Communities, pursuant to section 27 of the Transportation of Dangerous Goods Act, 1992 (see footnote b), hereby makes the annexed Regulations Amending the Transportation of Dangerous Goods Regulations.

The full amendment is at the above link. There are a significant number of changes; we highly recommended anyone affected by the TDG regulations to closely study the amendment.