From CCOHS:

The podcast details which dates the Canadian GHS regulations may be implemented as well as what classifications the new regulations will likely include.

Tenative dates for WHMIS/GHS:
-Proposed regulations released March 2013
-Final regulations released Jan 2014
-Implementation start date July 2015

The podcast is free for download at the following link:

http://www.ccohs.ca/products/podcasts/