Sure. Just to echo that comment, the “threats to the security of Canada” are already defined in the CSIS Act, as was said. It's very clear in the CSIS Act.
The Security of Canada Information Sharing Act is not just about CSIS. It's about the entire national security community as already scheduled in the act and includes 16 other departments and agencies, including defence, border control, law enforcement, and so on. The issue with the SCISA definition in the concept of undermining threats to security is both that you would not want confusion with the CSIS Act and that it also needs to be broad enough to include the entire national security community.