The office's powers were further enhanced in the eastern (or Byzantine) half of the Empire in 395, when Emperor Arcadius () stripped the Praetorian Prefecture of the East of some of its jurisdiction over the "cursus publicus", the palace guard ("Scholae Palatinae") and the imperial arsenals ("fabricae") and handed them to the "magister officiorum". These last changes are reflected in the "Notitia Dignitatum", a list of all offices compiled circa 400. In the year 443 the eastern "magister" was made inspector-general of the border army units or "limitanei" and was ordered to bring them up to full strength and effectiveness.