California Code of Civil Procedure 2031.290

(b) The party demanding an inspection shall retain both the original of the inspection demand, with the original proof of service affixed to it, and the original of the sworn response until six months after final disposition of the action. At that time, both originals may be destroyed, unless the court, on motion of any party and for good cause shown, orders that the originals be preserved for a longer period.

Added Stats 2004 ch 182 � 23 (AB 3081), operative July 1, 2005.