---
type: "Bill"
title: "Joint powers agreements: water corporations."
description: "Existing law, the Joint Exercise of Powers Act, authorizes 2 or more public agencies, if authorized by their governing bodies, by agreement to jointly exercise any power common to the contracting parties. Existing law authorizes 2 or more local public entities, or a mutual water company, as defined, and a public agency, to provide insurance, as specified, by a joint powers agreement. Existing law authorizes a mutual water company and a public agency to enter into a joint powers agreement for the purposes of risk pooling, as specified."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20252026"
identifier: "AB 428"
citation: "California AB 428 (20252026)"
classification: ["bill"]
subjects: ["Jointpowersagreements", "watercorporations"]
status: "enacted"
primary_sponsors: ["Blanca Rubio"]
version_count: 5
action_count: 21
vote_count: 7
first_action: "2025-02-05"
last_action: "2025-10-01"
source: "openstates"
source_identifier: "ocd-bill/b74c6748-1427-42b2-b018-d27873abfce3"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202520260AB428"
source_hash: "47a84f47182918ebb54812e0fbca7ba39001b36779f2b7aecc270a540383a77c"
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 428 (20252026) — Joint powers agreements: water corporations.

Existing law, the Joint Exercise of Powers Act, authorizes 2 or more public agencies, if authorized by their governing bodies, by agreement to jointly exercise any power common to the contracting parties. Existing law authorizes 2 or more local public entities, or a mutual water company, as defined, and a public agency, to provide insurance, as specified, by a joint powers agreement. Existing law authorizes a mutual water company and a public agency to enter into a joint powers agreement for the purposes of risk pooling, as specified.

## Version chain

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

1. **02/05/25 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260AB428&version=20250AB42899INT)
2. **03/28/25 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260AB428&version=20250AB42898AMD)
3. **10/01/25 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260AB428&version=20250AB42896CHP)
4. **AB428** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202520260AB428)
5. **09/05/25 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260AB428&version=20250AB42897ENR)

## Votes

- AB 428 Blanca Rubio Assembly Third Reading — **76–0** (pass) · lower
- Do pass, but first be re-referred to the Committee on [Energy, Utilities and Communications] — **7–0** (pass) · upper
- 3rd Reading AB428 Blanca Rubio By McNerney — **38–1** (pass) · upper
- Do pass. — **15–0** (pass) · lower
- Do pass, but first be re-referred to the Committee on [Appropriations] — **16–0** (pass) · upper
- Do pass and be re-referred to the Committee on [Local Government] — **17–0** (pass) · lower
- Do pass and be re-referred to the Committee on [Appropriations] — **10–0** (pass) · lower

## Sponsors

- Blanca Rubio — primary (person)

## Timeline

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

- **2025-02-05** Read first time. To print. `reading-1`
- **2025-02-06** From printer. May be heard in committee March 8.
- **2025-02-18** Referred to Coms. on INS. and L. GOV. `referral-committee`
- **2025-03-28** From committee chair, with author's amendments: Amend, and re-refer to Com. on INS. Read second time and amended. `amendment-introduction, amendment-passage, reading-1, reading-2`
- **2025-04-01** Re-referred to Com. on INS. `referral-committee`
- **2025-04-02** From committee: Do pass and re-refer to Com. on L. GOV. (Ayes 17. Noes 0.) (April 2). Re-referred to Com. on L. GOV. `committee-passage, committee-passage-favorable, referral-committee`
- **2025-04-10** From committee: Do pass and re-refer to Com. on APPR. (Ayes 10. Noes 0.) (April 9). Re-referred to Com. on APPR. `committee-passage, committee-passage-favorable, referral-committee`
- **2025-04-23** From committee: Do pass. (Ayes 15. Noes 0.) (April 23). `committee-passage, committee-passage-favorable`
- **2025-04-24** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2025-05-05** Read third time. Passed. Ordered to the Senate. (Ayes 76. Noes 0. Page 1424.) `passage, reading-1, reading-3`
- **2025-05-06** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2025-05-14** Referred to Coms. on L. GOV. and E., U & C. `referral-committee`
- **2025-06-18** From committee: Do pass and re-refer to Com. on E., U & C. (Ayes 7. Noes 0.) (June 18). Re-referred to Com. on E., U & C. `committee-passage, committee-passage-favorable, referral-committee`
- **2025-07-08** From committee: Do pass and re-refer to Com. on APPR. (Ayes 16. Noes 0.) (July 7). Re-referred to Com. on APPR. `committee-passage, committee-passage-favorable, referral-committee`
- **2025-08-19** From committee: Be ordered to second reading pursuant to Senate Rule 28.8. `committee-passage, reading-2`
- **2025-08-20** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2025-09-03** Read third time. Passed. Ordered to the Assembly. (Ayes 38. Noes 1. Page 2461.). `passage, reading-1, reading-3`
- **2025-09-03** In Assembly. Ordered to Engrossing and Enrolling. `committee-passage`
- **2025-09-09** Enrolled and presented to the Governor at 3 p.m.
- **2025-10-01** Approved by the Governor. `executive-signature`
- **2025-10-01** Chaptered by Secretary of State - Chapter 151, Statutes of 2025. `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/b74c6748-1427-42b2-b018-d27873abfce3`. Confidence: reported (aggregated from official California legislature records).