2005 California Code of Civil Procedure Sections 2031.510 Property in Specific Contexts

2031.510.  (a) In any action, regardless of who is the moving party,
where the boundary of land patented or otherwise granted by the
state is in dispute, or the validity of any state patent or grant
dated before 1950 is in dispute, all parties shall have the duty to
disclose to all opposing parties all nonprivileged relevant written
evidence then known and available, including evidence against
interest, relating to the above issues.
   (b) This evidence shall be disclosed within 120 days after the
filing with the court of proof of service upon all named defendants.
Thereafter, the parties shall have the continuing duty to make all
subsequently discovered relevant and nonprivileged written evidence
available to the opposing parties.