What is Actus Judiciarius Coram Non Judice Irritus Habetur, De Ministeriali Autem A Quocunque Provenit Ratum Esto?

Legal Definition
A judicial act by a judge without Jurisdiction is void; but a ministerial act, from whomsoever proceeding, may be ratified. Lofft, 458.
-- Black's Law Dictionary
Legal Definition
A judicial act by one not a judge is void; a ministerial act from whomsoever it proceed is valid.
-- Ballentine's Law Dictionary