I found the article previously mentioned:

[Link: tvtechnology.com]

Their website is sloowww. Give article time to load.

This article covers so much technical information that I could not possible begin to explain it here. Because it discusses the VHF-HI band, you folks up the GTA should read it due to the fact that CFTO and CHCH will eventually revert to their original frequencies. Hope this helps.. .