(1) No letter shall be delivered to, or sent by a convicted prisoner, until it has been examined by the Superintendent or by the jailor or other officer under the Superintendent’s orders, but no unnecessary delay should be allowed to occur in delivery or dispatch.
(2) If a letter is written in a language unknown to the Superintendent, he shall take steps to procure a translator before forwarding the letter.
(3) No letter written in cipher shall be allowed.
(4) The Superintendent may withhold any letter which seems to him to be in any way improper or objectionable.
(5) If a letter addressed to a prisoner is improper or objectionable it may be withheld under intimation to the prisoner and kept in the custody of the Superintendent or it may be returned to the sender under intimation to that prisoner.
(6) The Superintendent may, if he deems it necessary, communicate the contents of such a letter to the prisoner.