Perpetual Edict

The Perpetual Edict (Edictum Perpetuum) was a collection of Roman Laws combined into one work and completed in c. 129 CE.
It was commissioned by Hadrian (117-138 CE) and included the Twelve Tables with all the previous Edicts and Decrees of the Roman Senate.

It was done in c.129 CE, under Hadrian (117-138 CE), and designed to be used as the Standard for Civil Jurisprudence.
From then onwards, the law could not be revised without permission from the Emperor.
Before this, the Praetor’s Edict (Edictum Praetoris) was read out each year by the incoming Praetor Urbanus, the Magistrate responsible for administering the Law in Rome.
Until then, the new Praetor had been free to modify his predecessor’s Edict as he wished. The Perpetual Edict ended any freedom of interpretation.