Factually incorrect.
The Sterling TSE is a rip off the the ATRS Modern Sporter.
The ATRS Modern Sporter never was (nor ever will be) an AR 15..... the receivers will never interchange -not in a million years.
The AT-15 (which is/was a milspec AR 15) that was made by the good folks at ATRS was the on the May 1st OIC ..... the Modern Sporter was not... I don't recall seeing the ATRS Modern Hunter on the list for that matter.
The RCMP changed the FRT for the ATRS MS in Mid May 2020..... but so what anyway the FRT is not law. Full Stop.
Also factually incorrect.
About half way down the page you see a link for access for the public above a blue box. It will launch a PDF file that will take a good long time to open but rest assured the public can access the FRT...... even though .... once again... the FRT is not law. The RCMP disclaim this in the link below.
https://www.rcmp-grc.gc.ca/en/firearms/firearms-reference-table
That being said.... if you take yours out, you may want to keep a hard copy of the May 1st OIC with you.
In case you have to explain to RCMP officer (or some nosey bastard at your local gun range) that your gun is not an AR 15 affected by Sparkle Socks' OIC.
For my black rifle, I keep a hard copy of the OIC in my gun case at ALL times should this ever happen to me.
I am not lawyer, but I would suspect that in the worst case scenario, your gun would be confiscated onsite if the officer doesn't accept your reasoning......would they arrest you? who knows ?