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Cal. Evid. Code § 803
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§ 803 [Exclusion of Improper Opinion Basis]
Division 7: Opinion Testimony and Scientific Evidence | Chapter 1: Expert and Other Opinion Testimony | Article 1: Expert and Other Opinion Testimony Generally
Section titles shown in [brackets] are editorial additions for navigation purposes and are not part of the official statute.
Rule Text
The court may, and upon objection shall, exclude testimony in the form of an opinion that is based in whole or in significant part on matter that is not a proper basis for such an opinion. In such case, the witness may, if there remains a proper basis for his opinion, then state his opinion after excluding from consideration the matter determined to be improper.
Amendment history: Enacted by Stats. 1965, Ch. 299.