Русско-англо-русский юридический словарь

It would appear that the RSPB put a recording device on private land without the knowledge or permission of the landowner. The resulting film was then accepted by the sheriff as competent evidence and the gamekeeper was convicted on this evidence. On whose legal authority was the recording device so placed? Were the RSPB acting without (heraldscotland.com)

An executioner, also known as a public executioner, is a person who officially inflicts capital punishment ordered by the state or other legal authority, which was known in feudal terminology as high justice. (Wikipedia)

Legal Authority is any published source of law that presents the legal rules, legal doctrine, or legal reasoning that may be used as the basis for legal decisions. (Alexander Campbell King Law Library)