The statement that explains how Justinian’s Code was a turning point in the regulation of the Byzantine Empire is:
Justinian’s Code codified Roman law and allowed Justinian to have greater control of his empire.
Justinian's Code systematized and organized existing Roman laws, which helped to unify the legal framework of the empire and provided a clearer set of laws for the administration of justice. This consolidation of law was pivotal in consolidating Justinian's authority and governance over the Byzantine Empire.