You are right, in the sense that when the CRTC moves into implementation of this, the CRTC will have to articulate who precisely is caught and subject to any potential obligations. In doing that work, the CRTC would first, like the committee, look to whether there's a definition in this act, and there isn't.
You're right that it could then look to other legal instruments, in terms of other legislation or regulations elsewhere that have defined that. Again, I don't know the answer to that question off the top of my head. Failing that, they would craft their own definition, presumably based on the ordinary meaning of that term.