As a technical point, I would note that at issue is 83.03(b), which prohibits providing information to a terrorist group. A terrorist group then includes both listed and unlisted terrorist groups.
The goal of Bill C-41 is to allow entities or organizations, if they wish to apply to be exempted from potential criminal liability from that provision, to seek an exemption. There is authorization, and that would apply to any group they are concerned that they might be dealing with, whether listed or unlisted.