republic-os/legislation/us/states/ca/20232024/ab-43.md

---
type: "Bill"
title: "Greenhouse gas emissions: building materials: embodied carbon trading system."
description: "The California Global Warming Solutions Act of 2006 requires the State Air Resources Board to ensure that statewide greenhouse gas emissions are reduced to at least 40% below the 1990 level by 2030. Under the act, a violation of a rule, regulation, order, emission limitation, emission reduction measure, or other measure adopted by the state board under the act is a crime."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20232024"
identifier: "AB 43"
citation: "California AB 43 (20232024)"
classification: ["bill"]
subjects: ["Greenhouse gas emissions", "building materials", "embodied carbon trading system"]
status: "enacted"
primary_sponsors: ["Holden"]
version_count: 10
action_count: 29
vote_count: 8
first_action: "2022-12-05"
last_action: "2023-10-07"
source: "openstates"
source_identifier: "ocd-bill/522c7859-02f2-4a78-98cb-f4cb96b74656"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB43"
source_hash: "10eb5fb0f3a945c49fd272ad1ab83b6f7b45d8a1824d88ec31cee7889827fa07"
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 43 (20232024) — Greenhouse gas emissions: building materials: embodied carbon trading system.

The California Global Warming Solutions Act of 2006 requires the State Air Resources Board to ensure that statewide greenhouse gas emissions are reduced to at least 40% below the 1990 level by 2030. Under the act, a violation of a rule, regulation, order, emission limitation, emission reduction measure, or other measure adopted by the state board under the act is a crime.

## Version chain

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

1. **12/05/22 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB43&version=20230AB4399INT)
2. **03/02/23 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB43&version=20230AB4398AMD)
3. **03/30/23 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB43&version=20230AB4397AMD)
4. **06/20/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB43&version=20230AB4396AMD)
5. **07/06/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB43&version=20230AB4395AMD)
6. **09/01/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB43&version=20230AB4394AMD)
7. **09/08/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB43&version=20230AB4393AMD)
8. **10/07/23 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB43&version=20230AB4391CHP)
9. **AB43** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB43)
10. **09/18/23 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB43&version=20230AB4392ENR)

## Votes

- Do pass as amended and be re-referred to the Committee on [Appropriations] — **8–1** (pass) · lower
- 3rd Reading AB43 Holden By Becker — **28–8** (pass) · upper
- Do pass as amended — **5–2** (pass) · upper
- Placed on suspense file — **7–0** (pass) · upper
- AB 43 Holden Concurrence in Senate Amendments — **52–17** (pass) · lower
- Do pass as amended, but first amend, and re-refer to the Committee on [Appropriations] — **5–2** (pass) · upper
- Do pass. — **12–3** (pass) · lower
- AB 43 Holden Assembly Third Reading — **56–17** (pass) · lower

## Sponsors

- Holden — primary (person)

## Timeline

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

- **2022-12-05** Read first time. To print. `reading-1`
- **2022-12-06** From printer. May be heard in committee January 5.
- **2023-03-02** Referred to Com. on NAT. RES. `referral-committee`
- **2023-03-02** From committee chair, with author's amendments: Amend, and re-refer to Com. on NAT. RES. Read second time and amended. `amendment-introduction, amendment-passage, reading-1, reading-2`
- **2023-03-06** Re-referred to Com. on NAT. RES. `referral-committee`
- **2023-03-29** From committee: Amend, and do pass as amended and re-refer to Com. on APPR. (Ayes 8. Noes 1.) (March 27). `amendment-introduction, amendment-passage, committee-passage, referral-committee`
- **2023-03-30** Read second time and amended. `amendment-passage, reading-1, reading-2`
- **2023-04-03** Re-referred to Com. on APPR. `referral-committee`
- **2023-04-19** In committee: Set, first hearing. Referred to APPR. suspense file. `referral-committee`
- **2023-05-18** From committee: Do pass. (Ayes 12. Noes 3.) (May 18). `committee-passage, committee-passage-favorable`
- **2023-05-18** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2023-05-25** Read third time. Passed. Ordered to the Senate. (Ayes 56. Noes 17. Page 1744.) `passage, reading-1, reading-3`
- **2023-05-26** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2023-06-07** Referred to Com. on E.Q. `referral-committee`
- **2023-06-20** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on E.Q. `amendment-introduction, amendment-passage, reading-1, reading-2, referral-committee`
- **2023-07-05** From committee: Amend, and do pass as amended and re-refer to Com. on APPR. (Ayes 5. Noes 2.) (July 5). `amendment-introduction, amendment-passage, committee-passage, referral-committee`
- **2023-07-06** Read second time and amended. Re-referred to Com. on APPR. `amendment-passage, reading-1, reading-2, referral-committee`
- **2023-08-21** In committee: Referred to APPR suspense file. `referral-committee`
- **2023-09-01** From committee: Amend, and do pass as amended. (Ayes 5. Noes 2.) (September 1). `amendment-introduction, amendment-passage, committee-passage`
- **2023-09-01** Read second time and amended. Ordered returned to second reading. `amendment-passage, reading-1, reading-2`
- **2023-09-05** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2023-09-08** Read third time and amended. Ordered to second reading. `amendment-passage, reading-1, reading-3`
- **2023-09-11** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2023-09-13** Read third time. Passed. Ordered to the Assembly. (Ayes 27. Noes 8. Page 2719.). `passage, reading-1, reading-3`
- **2023-09-13** In Assembly. Concurrence in Senate amendments pending.
- **2023-09-13** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 52. Noes 17. Page 3480.). `amendment-passage, committee-passage-favorable`
- **2023-09-20** Enrolled and presented to the Governor at 4 p.m.
- **2023-10-07** Approved by the Governor. `executive-signature`
- **2023-10-07** Chaptered by Secretary of State - Chapter 316, Statutes of 2023. `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/522c7859-02f2-4a78-98cb-f4cb96b74656`. Confidence: reported (aggregated from official California legislature records).