Plastic License Plate Covers

What is the deal with getting an 'obstructed license plate' charge for those plastic covers license plate covers. The cover was clear, not tinted, scratched or dirty. My plates were visible.

Where is this law hiding in the HTA? and does it pertain to these covers?

You will find discussion here:http://www.ontariohighwaytrafficact.com/topic747.html

If you stop and read the labels on most aftermarket accessories they will say "check local laws" or something close to that. Just because CT sells them does not make them legal.

Would this plate be considered obstructed if ONTARIO, Yours to Discover, the crown, and the registration stickers and plate numbers were all 100% visible? This is just an example as I have a similar plate but not the same and I was toying with the idea of custom making a frame and didn't want to get slapped with a ticket.

If this plate is considered obstructed, what IS allowed in terms of a plate frame? I find the legislation pretty unspecific in terms of what is and is not allowed. From what I've read, and I'm no lawyer, but as long as the numbers are not obstructed it should be ok...

What about something like this:

Sec 13(2) Entire Plate Not Plainly Visible.