 Faustus was selected to promulgate the "Theodosian Code" in the Western Empire.Faustus was the son of Acilius Glabrio Sibidius, who is known from a dedication to him from Faustus.Sibidius was a member of the lineage of the Acilii Glabrii, who descended from the consul of 191 BC, Manius Acilius Glabrio.