What it means
に限る states that something is restricted or limited to a specified person, group, place, condition, or category. It is commonly used in rules, notices, eligibility statements, and formal descriptions of scope. The polite counterpart is に限ります.
Usage note
In this restrictive use, に限る follows a noun. Do not confuse it with the separate pattern in which a dictionary-form verb is followed by に限る to mean that doing something is the best choice. Also, に限って and に限らず express different meanings.
How to use it
Nounに限ります
この特典の利用者は、登録会員に限ります。
Users of this benefit are limited to registered members.
Nounに限る
この特典の利用者は、登録会員に限る。
Users of this benefit are limited to registered members.