The problem with laws like these is just as you say... How do you draw the line? Vague laws allow the government to draw the line wherever they want to achieve their goals. It's speculation yes, but abusing and reinterpreting vague laws is something governments do quite regularly when it suites their needs.

Unless you specifically clarify things, even the part you seem to think is clear can be interpreted differently. You say that a Tor node does not meet the criteria that "access is restricted by specific technical measures". But one could easily argue that Tor is a "specific technical measures" and access is to a Tor Node is restricted because you need to know what software to install and how to install it in order to access the Node.

It could also be argued that any encrypted communications is "restricted" in that it's private. It's restricted to the parties involved and not visible to outside observers.