not limited by official rules, laws, etc.

I have non-restricted access to the site. 我可以不受限制地访问该站点。

You can get a nonrestricted licence at the age of sixteen.

A non-restricted area is one that you do not need official permission to enter.

Security at nonrestricted airports is much less strict. 非管制性机场的安检没有那么严格。

The café is situated in the non-restricted area between the check-in counters and the departure hall.