republic-os/legislation/us/states/ca/20232024/ab-579.md

---
type: "Bill"
title: "Schoolbuses: zero-emission vehicles."
description: "Existing law authorizes state funds, upon appropriation by the Legislature, to be distributed to the Superintendent of Public Instruction for distribution to certain local educational agencies for the purchase of low- or zero-emission schoolbuses that replace, or increase the number of, schoolbuses in the existing schoolbus fleet or for retrofitting existing schoolbuses to achieve reductions in emissions, as specified."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20232024"
identifier: "AB 579"
citation: "California AB 579 (20232024)"
classification: ["bill"]
subjects: ["Schoolbuses", "zero-emission vehicles"]
status: "enacted"
primary_sponsors: ["Ting"]
version_count: 7
action_count: 27
vote_count: 8
first_action: "2023-02-08"
last_action: "2023-10-08"
source: "openstates"
source_identifier: "ocd-bill/a2bec3e1-c21f-4115-a767-362e2d4847f8"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB579"
source_hash: "61bf29a38a5880d02ea74176ffa823e7f54dcd9dfd22e16bc013cec326f37389"
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 579 (20232024) — Schoolbuses: zero-emission vehicles.

Existing law authorizes state funds, upon appropriation by the Legislature, to be distributed to the Superintendent of Public Instruction for distribution to certain local educational agencies for the purchase of low- or zero-emission schoolbuses that replace, or increase the number of, schoolbuses in the existing schoolbus fleet or for retrofitting existing schoolbuses to achieve reductions in emissions, as specified.

## Version chain

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

1. **02/08/23 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB579&version=20230AB57999INT)
2. **03/13/23 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB579&version=20230AB57998AMD)
3. **06/19/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB579&version=20230AB57997AMD)
4. **06/29/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB579&version=20230AB57996AMD)
5. **10/08/23 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB579&version=20230AB57994CHP)
6. **AB579** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB579)
7. **09/14/23 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB579&version=20230AB57995ENR)

## Votes

- Do pass as amended, but first amend, and re-refer to the Committee on [Appropriations] — **6–1** (pass) · upper
- AB 579 Ting Assembly Third Reading — **61–14** (pass) · lower
- Placed on suspense file — **7–0** (pass) · upper
- Do pass — **5–2** (pass) · upper
- Do pass and be re-referred to the Committee on [Appropriations] — **5–2** (pass) · lower
- Do pass. — **11–3** (pass) · lower
- 3rd Reading AB579 Ting By Newman — **31–8** (pass) · upper
- AB 579 Ting Concurrence in Senate Amendments — **63–11** (pass) · lower

## Sponsors

- Ting — primary (person)

## Timeline

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

- **2023-02-08** Read first time. To print. `reading-1`
- **2023-02-09** From printer. May be heard in committee March 11.
- **2023-02-17** Referred to Com. on ED. `referral-committee`
- **2023-03-13** From committee chair, with author's amendments: Amend, and re-refer to Com. on ED. Read second time and amended. `amendment-introduction, amendment-passage, reading-1, reading-2`
- **2023-03-14** Re-referred to Com. on ED. `referral-committee`
- **2023-03-16** In committee: Set, first hearing. Hearing canceled at the request of author.
- **2023-03-30** From committee: Do pass and re-refer to Com. on APPR. (Ayes 5. Noes 2.) (March 29). Re-referred to Com. on APPR. `committee-passage, committee-passage-favorable, referral-committee`
- **2023-04-26** In committee: Hearing postponed by committee.
- **2023-05-03** In committee: Set, first hearing. Referred to APPR. suspense file. `referral-committee`
- **2023-05-18** From committee: Do pass. (Ayes 11. Noes 3.) (May 18). `committee-passage, committee-passage-favorable`
- **2023-05-18** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2023-05-31** Read third time. Passed. Ordered to the Senate. (Ayes 61. Noes 14. Page 2024.) `passage, reading-1, reading-3`
- **2023-06-01** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2023-06-14** Referred to Com. on ED. `referral-committee`
- **2023-06-19** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on ED. `amendment-introduction, amendment-passage, reading-1, reading-2, referral-committee`
- **2023-06-28** From committee: Amend, and do pass as amended and re-refer to Com. on APPR. (Ayes 6. Noes 1.) (June 28). `amendment-introduction, amendment-passage, committee-passage, referral-committee`
- **2023-06-29** Read second time and amended. Re-referred to Com. on APPR. `amendment-passage, reading-1, reading-2, referral-committee`
- **2023-08-14** In committee: Referred to APPR suspense file. `referral-committee`
- **2023-09-01** From committee: Do pass. (Ayes 5. Noes 2.) (September 1). `committee-passage, committee-passage-favorable`
- **2023-09-05** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2023-09-11** Read third time. Passed. Ordered to the Assembly. (Ayes 31. Noes 8. Page 2553.). `passage, reading-1, reading-3`
- **2023-09-11** In Assembly. Concurrence in Senate amendments pending. May be considered on or after September 13 pursuant to Assembly Rule 77.
- **2023-09-12** Assembly Rule 77 suspended. (Page 3228.)
- **2023-09-12** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 63. Noes 11. Page 3235.). `amendment-passage, committee-passage-favorable`
- **2023-09-19** Enrolled and presented to the Governor at 4 p.m.
- **2023-10-08** Approved by the Governor. `executive-signature`
- **2023-10-08** Chaptered by Secretary of State - Chapter 445, 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/a2bec3e1-c21f-4115-a767-362e2d4847f8`. Confidence: reported (aggregated from official California legislature records).