US Attorney Huber reports to Deep State Rosenstein. Sessions is recused. Given those two facts, it is pretty clear what is meant by reporting "as appropriate" means in the Sessions Boyd letters.
Now obviously you have no reading comprehension skills so i'll try to help
Tell me what do you think it means by "If the inspector general (Horowitz) finds evidence of wrong doing he can refer it to a United States Attorney (Huber) who can then convene a grand jury or take other appropriate actions"?
What could other appropriate actions be?