An offer of compromise under UCPR r 20.26 (as in force before 7 June 2013) that included a term to pay the plaintiff's costs did not comply with the requirement that the offer be 'exclusive of costs', following Whitney. The rule has since been amended to require only that the offer 'must not include an amount for costs and must not be expressed to be inclusive of costs'. The Court articulated factors relevant to reopening a recent five-judge bench decision, holding that the desirability of certainty, the diminishing retrospective effect of the decision, and the fact that reasonable minds differed on the construction weighed against reopening.
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