The article actually details that the proposal on the table is to make it a crime to run sites whose access is restricted by specific technical measures and whose purpose or activity is oriented towards the goal of aiding crime.

The notion that it would become a crime to run a tor exit node is actually speculation on the part of the authors of this article.

But is not apparent to me how that would follow from such a law: For example, since anyone can access tor, and, by implication, any tor exit node, access to a tor exit node is not restricted in any way, so it would not seem to fall under this law in my opinion.

As for running a tor hidden service, this would seem to apply but still: How do you draw the line between running a service where it just so happens that criminal business is conducted over that service, versus running a service whose purpose or activity is actually directed towards aiding crime?