What my colleague said was correct. Once they are listed under certain provisions in SEMA, they would be inadmissible to Canada.
The question you asked was about non-state actors. In this particular question about terrorists, the sanction provisions.... Currently, the way the immigration act is written would not automatically deem them inadmissible by virtue of that sanction of the United Nations or under SEMA. Or, if the provisions of SEMA that are not currently covered by the immigration act...they would not be deemed inadmissible to Canada. That being said, there are other provisions in the immigration act that cover people being terrorists and being inadmissible to Canada.
We'd have to look at the individual circumstances of the individual case to determine if they're inadmissible.