You may have heard about the CRTC's wireless code. In December of last year, the CRTC implemented a mandatory code of conduct for wireless services. In that code, providers must suspend national and international data roaming charges and services when these reach $100 per month, unless the customer expressly consents otherwise. The CRTC has included a measure with respect to that issue in the wireless code.
On May 5th, 2014. See this statement in context.