Code Civ. Proc., § 662.5

(a) In any civil action where after trial by jury an order granting a new trial limited to the issue of damages would be proper, the trial court may in its discretion:

(1) If the ground for granting a new trial is inadequate damages, issue a conditional order granting the new trial unless the party against whom the verdict has been rendered consents to the addition of damages in an amount the court in its independent judgment determines from the evidence to be fair and reasonable.

(2) If the ground for granting a new trial is excessive damages, issue a conditional order granting the new trial unless the party in whose favor the verdict has been rendered consents to the reduction of so much thereof as the court in its independent judgment determines from the evidence to be fair and reasonable.

(b) If a deadline for acceptance or rejection of the addition or reduction of damages is not set forth in the conditional order, the deadline is 30 days from the date the conditional order is served by the clerk of the court. Failure to respond to the order in accordance with this section shall be deemed a rejection of the addition or reduction of damages and a new trial limited to the issue of damages shall be granted automatically.

(c) A party filing and serving an acceptance of a conditionally ordered addition or reduction of damages shall concurrently serve and submit to the court a proposed amended judgment reflecting the modified judgment amount, as well as any other uncontested judgment awards.