I think it's a very interesting question. It raises the spectre that I didn't even think of as well, which is essentially information laundering. I'm actually a little ashamed, because I'm usually pretty good at worst-case scenarios.
In an example like this you could—I don't know, but maybe this is one of those movie plot theories—imagine a scenario in which, for example, CSIS goes to the RCMP and says they would like to have all the recordings the RCMP have made of communications they intercepted with a warrant. Now, the RCMP can't make collateral use of that, likely because of the conditions in the warrant. However, as soon as CSIS has it, which they can do under SCISA, they're not subject to those restrictions; they're subject to their own kind of restrictions.
You could, in fact, by moving information from one department to another—which is completely allowed under this—change the nature of the protection of that information or lift those protections. That section 9 that I referred to would remove any civil liability for doing that, and that could be troubling.
Yes, I'm going to lose sleep over that.