XXX. Also, it is ordained that the chief serjeants of fees, and their attorneys, do duly execute the writs of the King, and of his sheriffs, as they ought to do; and if they shall not so do, and thereof be attainted, their bailiwicks shall be seised into the King's hands, and their bodies be sent to prison: and that henceforth they shall not lease their bailiwicks at a higher rent than anciently it was, according to what by the Statute thereupon made in England is ordained.