Um. (again)
That's not how the law works (ask a lawyer if you're unsure), and the question is about legality.
Nowhere does it say I'm not allowed to eat bananas, ergo, I'm allowed to eat bananas.
The lawbooks would be infinitely long if they had to list everything you can do (rather than only those you can't).
So the onus is on you, or the regulator, or the policeman or the headmaster...
...to show a breach of rules. If you/they are not able to do so, no rules have been breached and it's legal.