California Code, Corporations Code - CORP § 15911.25

(a) If the limited partnership denies that a limited partnership interest is a dissenting interest, or the limited partnership and a dissenting limited partner fail to agree upon the fair market value of a dissenting interest, then such limited partner or any interested limited partnership, within six months after the date on which notice of the approval of the reorganization by the requisite vote or consent of the limited partners was mailed to the limited partner, but not thereafter, may file a complaint in the superior court of the proper county praying the court to determine whether the interest is a dissenting interest, or the fair market value of the dissenting interest, or both, or may intervene in any action pending on such a complaint.

(b) Two or more dissenting limited partners may join as plaintiffs or be joined as defendants in any such action and two or more such actions may be consolidated.

(c) On the trial of the action, the court shall determine the issues.  If the status of the limited partnership interest as a dissenting interest is in issue, the court shall first determine that issue.  If the fair market value of the dissenting interest is in issue, the court shall determine, or shall appoint one or more impartial appraisers to determine, the fair market value of the dissenting interest.