amicus curiae brief. Что-то я завис, не могу уловить смысла этого briefs до конца

Слово встречается в следующем контексте:

Neither the OP nor the Rules of Procedure of the HRC provide for the consideration of briefs provided by third parties. However, in practice, the HRC will accept the submission of an amicus curiae brief if the author of the complaint has authorised submission of the same.

Заранее спасибо

Literally, friend of the court. A person with strong interest in or views on the subject matter of an action, but not a party to the action.
An amicus curiae educates the court on points of law that are in doubt, gathers or organizes information, or raises awareness about some aspect of the case that the court might otherwise miss. The person is usually, but not necessarily, an attorney, and is usually not paid for her or his expertise. An amicus curiae must not be a party to the case, nor an attorney in the case, but must have some knowledge or perspective that makes her or his views valuable to the court.