It looks like you are dealing with some weirdo electrical type out there in CYKA.
The CEC does not require an automatic humidity control for fans in bathrooms. (At least not in my latest 2008 version that I can find). There is a requirement, however, for a switch to control any bathroom fan that has to be easily accessible to the HO somewhere near the bathroom door but more than 1 metre from the tub however.
Maybe you have some pot smoking type trying out some brain addled ideas for humidity control.