Code of Civil Procedure § 1258.030
ARTICLE 1. Discovery
Nothing in this chapter makes admissible any evidence that is not otherwise admissible or permits a witness to base an opinion on any matter that is not a proper basis for such an opinion.
ARTICLE 1. Discovery
Nothing in this chapter makes admissible any evidence that is not otherwise admissible or permits a witness to base an opinion on any matter that is not a proper basis for such an opinion.