Evid. Code, § 801 · Article 1. Expert and Other Opinion Testimony Generally
Evid. Code, § 801
Text — As published in the Legislative Counsel's database, tables dated October 18, 2026 (pubinfo_2025.zip)
If a witness is testifying as an expert, his testimony in the form of an opinion is limited to such an opinion as is:
(a) Related to a subject that is sufficiently beyond common experience that the opinion of an expert would assist the trier of fact; and
(b) Based on matter (including his special knowledge, skill, experience, training, and education) perceived by or personally known to the witness or made known to him at or before the hearing, whether or not admissible, that is of a type that reasonably may be relied upon by an expert in forming an opinion upon the subject to which his testimony relates, unless an expert is precluded by law from using such matter as a basis for his opinion.
Notes and commentary — not statutory text
History
Enacted by Stats. 1965, Ch. 299.
Source of truth
- Edition
- As published in the Legislative Counsel's database, tables dated October 18, 2026 (pubinfo_2025.zip)
- Official file
- https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=EVID§ionNum=801.
- Text hash
- sha256 9642bc2063b70142928271d714d46f87e5e4b5f8c1edec43bbd54c3e63fc10ce
- Composed by
- compose_ca.py 2026-10-22: the Legislative Counsel's CAML content files read by a tokenizer (caml_readers.reader_a); an independent xml.etree reading (caml_readers.reader_b) agrees on every section
Cited by 4 provisions
Provisions in this library whose text cites Evid. Code, § 801. Each shows the citation as that text prints it.
Procedural information only. Not legal advice and not a substitute for the advice of an attorney. Confirm the current text with the official publisher before relying on it.