Can a motion of any party appoint one or more experts to investigate, to render a report and testify as an expert at any time before or during the trial of an action?

motion of any party may appoint one or more experts to investigate, to render a report as may be ordered by the court, and to testify as an expert at the trial of the action relative to the fact or matter as to which the expert evidence is or may be required." It has been held that the phrase "at any time before or during the trial of an action" (Evid. Code, 730), does not include posttrial hearings. (People v. Stuckey (2009) 175 Cal.App.4th 898, 913.)