Indeed, it's important to mention that this provision is not a retroactive provision. It's purpose is simply to confirm the government's position on the matter.
Had it not been for section 18.7, the joint committee could have insisted on the fact that certain regulations should be republished or should be subject to retroactive legislation. This provision was added to avoid that legal uncertainty.
It is also to put an end to potential debate. In fact, in other cases, we had to legislate to retroactively validate certain regulations. Some regulations had to be republished at the request of the standing joint committee. So it was to ensure a certain legal certainty with respect to what already exists and to the practice of incorporation by reference.