What is Ob Infamiam Non Solet Juxta Legem Terrae Aliquis Per Legem Apparentem Se Purgare, Nisi Prius Convictus Fuerit Vel Confessus In Curia?

Legal Definition
Glan. llb. 14, c. ii. On account of evil report, It is not usual, according to the law of the land, for any person to purge himself, unless he have been previously convicted, or confessed in court.
-- Black's Law Dictionary
Legal Definition
On account of ill repute it is not customary according to the law of the land for anyone to purge himself by lex apparens, unless he was convicted or confessed in court.
-- Ballentine's Law Dictionary