(1) An offer to settle is made without prejudice (a without prejudice offer ) unless the offer states that it is an open offer.
(2) A party must not mention the fact that a without prejudice offer has been made, or the terms of the offer:
(a) in any document filed; or
(b) at a hearing or trial.
(3) If a party makes an open offer, any party may disclose the facts and terms of the offer to other parties and the court.
(4) Subrule (2) does not apply to:
(a) an application relating to an offer; or
(b) an application for costs.