---
type: "Bill"
title: "Psychology."
description: "Psychology."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "19992000"
identifier: "AB 400"
citation: "California AB 400 (19992000)"
classification: ["bill"]
subjects: ["Psychology."]
status: "enacted"
primary_sponsors: ["Lempert"]
version_count: 9
action_count: 28
vote_count: 6
first_action: "1999-02-12"
last_action: "2000-09-26"
source: "openstates"
source_identifier: "ocd-bill/db8bf726-7b2c-4935-b0c2-496e304f6dca"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=199920000AB400"
source_hash: "6f1d1cdf220d1932bf5df5ea9dc9d39f1e5209352c6cdb70f1b03ab1416bcf67"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-ca"]
---

# California AB 400 (19992000) — Psychology.

## Version chain

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

1. **02/12/99 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB400&version=19990AB40099INT)
2. **05/06/99 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB400&version=19990AB40098AMD)
3. **05/18/99 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB400&version=19990AB40097AMD)
4. **07/06/00 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB400&version=19990AB40095AMD)
5. **07/06/99 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB400&version=19990AB40096AMD)
6. **08/07/00 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB400&version=19990AB40094AMD)
7. **09/26/00 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB400&version=19990AB40092CHP)
8. **AB400** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=199920000AB400)
9. **08/21/00 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB400&version=19990AB40093ENR)

## Votes

- AB 400 LEMPERT THIRD READING — **pass** (pass) · lower
- Do pass as amended. — **pass** (pass) · upper
- AB 400 LEMPERT CONCURRENCE — **pass** (pass) · lower
- Do pass as amended. — **pass** (pass) · upper
- Assembly 3rd Reading AB400 Lempert O'Connell — **pass** (pass) · upper
- Do pass as amended. — **pass** (pass) · lower

## Sponsors

- Lempert — primary (person)
- Calderon — coauthor (person)
- O'Connell — coauthor (person)

## Timeline

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

- **2000-09-26** Chaptered by Secretary of State - Chapter 625, Statutes of 2000.
- **2000-09-24** Approved by the Governor. `executive-signature`
- **2000-08-25** Enrolled and to the Governor at 11:45 a.m.
- **2000-08-21** Senate amendments concurred in. To enrollment. (Ayes 52. Noes 23. Page 8025.) `committee-passage-favorable, amendment-passage`
- **2000-08-14** In committee: Set, second hearing. Hearing canceled at the request of author.
- **2000-08-10** In Assembly. Concurrence in Senate amendments pending. May be considered on or after August 12 pursuant to Assembly Rule 77.
- **2000-08-10** Read third time, passed, and to Assembly. (Ayes 25. Noes 10. Page 5702.) `passage, reading-3, reading-1`
- **2000-08-08** Read second time. To third reading. `reading-2, reading-1`
- **2000-08-07** Read third time, amended. To second reading. `reading-3, amendment-passage, reading-1`
- **2000-07-06** Read second time, amended, and to third reading. `amendment-passage, reading-2, reading-1`
- **2000-07-05** From committee: Amend, and do pass as amended. (Ayes 6. Noes 0.). `committee-passage, amendment-introduction, amendment-passage`
- **2000-06-20** Withdrawn from committee. Re-referred to Standing Committee on Business, Professions and Consumer Protection. `referral-committee`
- **2000-06-19** Withdrawn from committee. Re-referred to Standing Committee on Rules. `referral-committee`
- **1999-08-16** In committee: Set, first hearing. Hearing canceled at the request of author.
- **1999-07-07** Re-referred to Standing Committee on Appropriations pursuant to Joint Rule 10.5. `referral-committee`
- **1999-07-06** Read second time, amended, and to third reading. `amendment-passage, reading-2, reading-1`
- **1999-07-02** From committee: Amend, and do pass as amended. (Ayes 5. Noes 1.). `committee-passage, amendment-introduction, amendment-passage`
- **1999-06-02** Referred to Standing Committee on Business, Professions and Consumer Protection. `referral-committee`
- **1999-05-28** In Senate. Read first time. To Standing Committee on Rules for assignment. `reading-1`
- **1999-05-27** Read third time, passed, and to Senate. (Ayes 52. Noes 26. Page 1963.) `passage, reading-3, reading-1`
- **1999-05-19** Read second time. To third reading. `reading-2, reading-1`
- **1999-05-18** Read second time and amended. Ordered returned to second reading. `amendment-passage, reading-2, reading-1`
- **1999-05-17** From committee: Amend, and do pass as amended. (Ayes 9. Noes 4.) (May 11). `committee-passage, amendment-introduction, amendment-passage`
- **1999-05-10** Re-referred to Standing Committee on Health. `referral-committee`
- **1999-05-06** From committee chair, with author's amendments: Amend, and re-refer to Standing Committee on Health. Read second time and amended. `amendment-introduction, amendment-passage, reading-2, reading-1, referral-committee`
- **1999-02-25** Referred to Standing Committee on Health. `referral-committee`
- **1999-02-16** From printer. May be heard in committee March 18.
- **1999-02-12** Read first time. To print. `reading-1`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/db8bf726-7b2c-4935-b0c2-496e304f6dca`. Confidence: reported (aggregated from official California legislature records).