Emperors Arcadius and Honorius issue a new decree that any Jews or Samaritans employed with the secret service must be fired.
According to the new decree:
"We decree that the Jews and Samaritans who flatter themselves with the privilege of being in the secret service will be deprived of all employment with imperial service." [CTh 16.8.16]
No reasons are given for why Jews and Samaritans cannot be with the imperial service at any level, but it seems likely that it is connected to some lack of trust.