---
type: "Bill"
title: "Wetlands mitigation banking."
description: "Wetlands mitigation banking."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "19992000"
identifier: "AB 642"
citation: "California AB 642 (19992000)"
classification: ["bill"]
subjects: ["Wetlands mitigation banking."]
status: "enacted"
primary_sponsors: ["Lempert"]
version_count: 13
action_count: 31
vote_count: 8
first_action: "1999-02-23"
last_action: "2000-09-30"
source: "openstates"
source_identifier: "ocd-bill/0db9e0e4-1597-47d1-95a0-4589fe1788a8"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=199920000AB642"
source_hash: "a364e2fc4c4b0492f92e369f1720822565c920f6723a35535427a62253d78701"
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 642 (19992000) — Wetlands mitigation banking.

## Version chain

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

1. **02/23/99 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64299INT)
2. **04/05/99 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64298AMD)
3. **05/28/99 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64297AMD)
4. **07/06/99 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64296AMD)
5. **08/07/00 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64293AMD)
6. **08/08/00 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64292AMD)
7. **08/10/00 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64291AMD)
8. **08/17/99 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64295AMD)
9. **08/18/99 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64294AMD)
10. **08/25/00 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64290AMD)
11. **09/30/00 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64288CHP)
12. **AB642** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=199920000AB642)
13. **08/29/00 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=199920000AB642&version=19990AB64289ENR)

## Votes

- Placed on Appropriations Suspense file. — **pass** (pass) · upper
- Assembly 3rd Reading AB642 Lempert O'Connell — **pass** (pass) · upper
- AB 642 LEMPERT CONCURRENCE — **pass** (pass) · lower
- AB 642 LEMPERT THIRD READING — **pass** (pass) · lower
- Do pass and be re-referred to the Committee on Appropriations. — **pass** (pass) · lower
- Do pass as amended. — **pass** (pass) · upper
- Do pass as amended, and re-refer to the Committee on Appropriations. — **pass** (pass) · upper
- Do pass as amended. — **pass** (pass) · lower

## Sponsors

- Lempert — primary (person)

## Timeline

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

- **2000-09-30** Chaptered by Secretary of State - Chapter 950, Statutes of 2000.
- **2000-09-29** Approved by the Governor. `executive-signature`
- **2000-09-06** Enrolled and to the Governor at 3:30 p.m.
- **2000-08-29** Assembly Rule 77 suspended. Senate amendments concurred in. To enrollment. (Ayes 55. Noes 23. Page 8562.) `committee-passage-favorable, amendment-passage`
- **2000-08-28** In Assembly. Concurrence in Senate amendments pending. May be considered on or after August 30 pursuant to Assembly Rule 77.
- **2000-08-28** Read third time, passed, and to Assembly. (Ayes 26. Noes 11. Page 6120.) `passage, reading-3, reading-1`
- **2000-08-25** From committee: Amend, and do pass as amended. (Ayes 8. Noes 3.). Read second time and amended. Ordered to third reading. `amendment-introduction, amendment-passage, committee-passage, reading-2, reading-1`
- **2000-08-22** Joint Rule 61(b)(14) suspended.
- **2000-08-14** In committee: Placed on Appropriations suspense file.
- **2000-08-10** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Appropriations. `amendment-introduction, amendment-passage, reading-2, reading-1, referral-committee`
- **2000-08-08** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Appropriations. `amendment-introduction, amendment-passage, reading-2, reading-1, referral-committee`
- **2000-08-07** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Appropriations. `amendment-introduction, amendment-passage, reading-2, reading-1, referral-committee`
- **1999-08-24** (Corrected August 23. )
- **1999-08-18** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Appropriations. `amendment-introduction, amendment-passage, reading-2, reading-1, referral-committee`
- **1999-08-17** Read second time, amended, and re-referred to Standing Committee on Appropriations. `amendment-passage, reading-2, reading-1, referral-committee`
- **1999-08-16** From committee: Amend, and do pass as amended, and re-refer to Standing Committee on Appropriations (Ayes 5. Noes 2.). `committee-passage, amendment-introduction, amendment-passage, referral-committee`
- **1999-07-06** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Natural Resources And Water. `amendment-introduction, amendment-passage, reading-2, reading-1, referral-committee`
- **1999-06-22** In committee: Set, first hearing. Hearing canceled at the request of author.
- **1999-06-21** In committee: Hearing cancelled at the request of author.
- **1999-06-07** Referred to Standing Committee on Natural Resources And Water. `referral-committee`
- **1999-06-03** In Senate. Read first time. To Standing Committee on Rules for assignment. `reading-1`
- **1999-06-02** Read third time, passed, and to Senate. (Ayes 50. Noes 29. Page 2310.) `passage, reading-3, reading-1`
- **1999-06-01** Read second time. To third reading. `reading-2, reading-1`
- **1999-05-28** From committee: Amend, and do pass as amended. (Ayes 14. Noes 7.) (May 26). Read second time and amended. Ordered returned to second reading. `amendment-introduction, amendment-passage, committee-passage, reading-2, reading-1`
- **1999-04-28** In committee: Set, first hearing. Referred to Standing Committee on Appropriations suspense file. `referral-committee`
- **1999-04-13** From committee: Do pass, and re-refer to Standing Committee on Appropriations Re-referred. (Ayes 7. Noes 4.) (April 12). `committee-passage, committee-passage-favorable, referral-committee`
- **1999-04-07** Re-referred to Standing Committee on Natural Resources. `referral-committee`
- **1999-04-05** From committee chair, with author's amendments: Amend, and re-refer to Standing Committee on Natural Resources Read second time and amended. `amendment-introduction, amendment-passage, reading-2, reading-1, referral-committee`
- **1999-03-08** Referred to Standing Committee on Natural Resources. `referral-committee`
- **1999-02-24** From printer. May be heard in committee March 26.
- **1999-02-23** 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/0db9e0e4-1597-47d1-95a0-4589fe1788a8`. Confidence: reported (aggregated from official California legislature records).