(b) UNACCEPTED OFFER. An unaccepted offer is considered withdrawn, but it does not preclude a later offer. Evidence of an unaccepted offer is not admissible except in a proceeding to determine costs.
(c) OFFER AFTER LIABILITY IS DETERMINED. When one party’s liability to another has been determined but the extent of liability remains to be determined by further proceedings, the party held liable may make an offer of judgment. It must be served within a reasonable time — but at least 14 days — before the date set for a hearing to determine the extent of liability.
(d) PAYING COSTS AFTER AN UNACCEPTED OFFER. If the judgment that the offeree finally obtains is not more favorable than the unaccepted offer, the offeree must pay the costs incurred after the offer was made.
