§ 803
65 words·~1 min read·
/ca/evidence-code/803A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
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.