"rule at law reasoned" в учебнике "Professional English in use - Law"

[yevgeniy]

Здравствуйте!

During a trial, counsel will cite cases and either attempt to distinguish the case at trial from those referred to or, alternatively, argue that the rule at law reasoned and established in a previous case is applicable and should be followed.

(https://archive.org/stream/CambridgeProfessionalEnglishInUse.Law2/Cambridge Professional English in Use. Law_2_djvu.txt)

Что такое "rule at law" ?

Спасибо!

[Marius]

Бкувально "правило к закону" когда руководствуются "прецедент"-ом, я так понимаю.