intransitive. Of a ruling, proclamation, writ, etc.: to have force, validity, or (esp. legal) authority; to be recognized; to be effective.

intransitive. To lay down rules, laws, etc.; to dictate, direct; to make a ruling. Also, of a law, custom, etc.: to have force or power.

intransitive. To take legal effect, to come into legal operation or become of legal relevance. Frequently with upon.

To take effect legally; to be valid.