California Code, Code of Civil Procedure - CCP § 995.950

(a) Unless the parties otherwise agree, the hearing on an objection shall be held not less than two or more than five days after service of the notice of motion.

(b) The hearing shall be conducted in such manner as the court determines is proper. The court may permit witnesses to attend and testify and evidence to be procured and introduced in the same manner as in the trial of a civil case.

(c) If the value of property or an interest in property is a ground for the objection, the court shall estimate its value. The court may appoint one or more disinterested persons to appraise property or an interest in property for the purpose of estimating its value.