All of the powers of the tribune derived from their sacrosanctity. He granted her and his wife Livia the extraordinary privileges of sacrosanctity. Anyone who violated the sacrosanctity of the tribunes might be killed without penalty. Instead, they relied on the sacrosanctity of their person to obstruct. This was not the first time Caesar had violated a tribune's sacrosanctity. The invocation of a religious law provided the justification and sacrosanctity conferred impunity.