{"data":{"id":"us-ca/evid-803","jurisdiction":"us-ca","citation":"EVID § 803","heading":"","body":"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.","path":["Evidence Code - EVID","DIVISION 7. OPINION TESTIMONY AND SCIENTIFIC EVIDENCE [800. - 870.]","CHAPTER 1. Expert and Other Opinion Testimony [800. - 870.]","ARTICLE 1. Expert and Other Opinion Testimony Generally [800. - 805.]"],"source_url":"https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zip","current_through":"2026-09-13","vintage":"","retrieved_at":"2026-09-14T05:56:33Z","sha256":"ce3ca9f850724458a67932bc94347f289f1bd2da2333a263e7a1505a968a1276","source_id":"us-ca","stale":false,"prev":"us-ca/evid-802","next":"us-ca/evid-804"},"notice":"GroundRules: Original legal text. Not legal advice."}