Negative. That would be the ship's captain's responsibility. For containers coming into Canada and being off-loaded here in Canada on terminals, it would be CBSA's responsibility to make sure they are screened and properly managed. With regard to the terminal, they also have a responsibility in terms of the marine facility security plan, which looks after the overall terminal posture of security.
Evidence of meeting #14 for Fisheries and Oceans in the 44th Parliament, 1st session. (The original version is on Parliament’s site, as are the minutes.) The winning word was containers.
A recording is available from Parliament.