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type, title, description, jurisdiction, legislature, session, identifier, citation, classification, subjects, status, primary_sponsors, version_count, action_count, vote_count, first_action, last_action, source, source_identifier, source_url, source_hash, vintage, source_snapshot, retrieved_at, confidence, tags
type title description jurisdiction legislature session identifier citation classification subjects status primary_sponsors version_count action_count vote_count first_action last_action source source_identifier source_url source_hash vintage source_snapshot retrieved_at confidence tags
Bill Evidence: expert testimony. Existing law authorizes an expert witness to testify in the form of an opinion, if the opinion is sufficiently beyond the common experience such that it would assist the trier of fact and if the opinion is based on matter, whether or not admissible, that is known to the witness prior to their testimony and that may reasonably be relied upon by an expert in forming their opinion in the matter, unless the witness is precluded by law from using those reasons or matter as a basis for the opinion. us/states/ca California Legislature 20232024 SB 652 California SB 652 (20232024)
bill
Evidence
expert testimony
enacted
Umberg
7 23 5 2023-02-16 2023-07-13 openstates ocd-bill/f802b82c-fddb-4b02-a8da-90eaf9269533 http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240SB652 9b056adc7541a21b0e3d54799ba0de1d21b75406bb97666137d4d9811ce357a3 2026-07-01 https://data.openstates.org/daily/2026-07-01/public.pgdump 2026-07-06 reported
legislation
bill
us-ca

California SB 652 (20232024) — Evidence: expert testimony.

Existing law authorizes an expert witness to testify in the form of an opinion, if the opinion is sufficiently beyond the common experience such that it would assist the trier of fact and if the opinion is based on matter, whether or not admissible, that is known to the witness prior to their testimony and that may reasonably be relied upon by an expert in forming their opinion in the matter, unless the witness is precluded by law from using those reasons or matter as a basis for the opinion.

Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

  1. 02/16/23 - Introduced (filed) — source
  2. 03/20/23 - Amended Senate (committee substitute) — source
  3. 04/13/23 - Amended Senate (committee substitute) — source
  4. 06/08/23 - Amended Assembly (committee substitute) — source
  5. 07/13/23 - Chaptered (committee substitute) — source
  6. SB652 (committee substitute) — source
  7. 06/23/23 - Enrolled (enrolled) — source

Votes

  • Do pass as amended, but first amend, and re-refer to the Committee on [Public Safety] with the recommendation: To Consent Calendar — 100 (pass) · upper
  • Do pass as amended. To Consent Calendar. — 110 (pass) · lower
  • 3rd Reading — 360 (pass) · upper
  • Special Consent — 390 (pass) · upper
  • SB 652 Umberg Consent Calendar Second Day — 740 (pass) · lower

Sponsors

  • Umberg — primary (person)

Timeline

The legislative action history — every referral, reading, and vote.

  • 2023-02-16 Introduced. Read first time. To Com. on RLS. for assignment. To print. introduction, reading-1
  • 2023-02-17 From printer. May be acted upon on or after March 19.
  • 2023-03-01 Referred to Coms. on JUD. and PUB S. referral-committee
  • 2023-03-20 From committee with author's amendments. Read second time and amended. Re-referred to Com. on JUD. amendment-passage, committee-passage, reading-1, reading-2, referral-committee
  • 2023-03-21 Set for hearing April 11.
  • 2023-04-12 From committee: Do pass as amended and re-refer to Com. on PUB S. with recommendation: To consent calendar. (Ayes 10. Noes 0. Page 687.) (April 11). amendment-passage, committee-passage, committee-passage-favorable
  • 2023-04-13 Read second time and amended. Re-referred to Com. on PUB S. amendment-passage, reading-1, reading-2, referral-committee
  • 2023-04-17 Withdrawn from committee.
  • 2023-04-17 Ordered to second reading.
  • 2023-04-18 Read second time. Ordered to third reading. reading-1, reading-2
  • 2023-05-08 Read third time. Passed. (Ayes 36. Noes 0. Page 1021.) Ordered to the Assembly. passage, reading-1, reading-3
  • 2023-05-08 In Assembly. Read first time. Held at Desk. reading-1
  • 2023-05-18 Referred to Com. on JUD. referral-committee
  • 2023-06-07 From committee: Do pass as amended. Ordered to consent calendar. (Ayes 11. Noes 0.) (June 6). amendment-passage, committee-passage, committee-passage-favorable
  • 2023-06-08 Read second time and amended. Ordered to second reading. amendment-passage, reading-1, reading-2
  • 2023-06-12 Read second time. Ordered to consent calendar. reading-1, reading-2
  • 2023-06-15 Read third time. Passed. (Ayes 74. Noes 0. Page 2266.) Ordered to the Senate. passage, reading-1, reading-3
  • 2023-06-15 In Senate. Concurrence in Assembly amendments pending.
  • 2023-06-20 Ordered to special consent calendar.
  • 2023-06-22 Assembly amendments concurred in. (Ayes 39. Noes 0. Page 1683.) Ordered to engrossing and enrolling. amendment-passage, committee-passage-favorable
  • 2023-07-05 Enrolled and presented to the Governor at 4 p.m.
  • 2023-07-13 Approved by the Governor. executive-signature
  • 2023-07-13 Chaptered by Secretary of State. Chapter 75, Statutes of 2023. became-law

Source

OpenStates / OpenCivicData bulk snapshot 2026-07-01; origin ocd-bill/f802b82c-fddb-4b02-a8da-90eaf9269533. Confidence: reported (aggregated from official California legislature records).