。
You must not break the law.
Literal
Law [object-を] violate-[must-not-てはならない]
~てはならない is a more formal variant of ~てはいけない, with the same 'must not' meaning but stiffer — the kind used in written rules, legal prohibitions, and moral precepts. 法 (single kanji) is the formal/literary short form of 法律, common in compound words and solemn contexts.