republic-os/legislation/us/states/ca/20112012/ab-2516.md

---
type: "Bill"
title: "Independent System Operator."
description: "The existing restructuring of the electrical industry within the Public Utilities Act provides for the establishment of an Independent System Operator (ISO) as a nonprofit public benefit corporation. Existing law requires the ISO to manage the transmission grid and related energy markets in a manner that is consistent with (1) making the most efficient use of available energy resources, (2) reducing, to the extent possible, overall economic cost to the state's consumers, (3) applicable state law intended to protect the public's health and the environment, and (4) maximizing the availability of existing electric generation resources necessary to meet the needs of the state's electricity consumers."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20112012"
identifier: "AB 2516"
citation: "California AB 2516 (20112012)"
classification: ["bill"]
subjects: ["Independent System Operator."]
status: "enacted"
primary_sponsors: ["Bradford"]
version_count: 5
action_count: 19
vote_count: 5
first_action: "2012-02-24"
last_action: "2012-07-13"
source: "openstates"
source_identifier: "ocd-bill/5985ad00-1b09-44f1-af97-d06c86adfb4e"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201120120AB2516"
source_hash: "533c6d5c6bc4a941cf04248305ef79d3f18c8363b2d178e5d5a0f0e428c85828"
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 2516 (20112012) — Independent System Operator.

The existing restructuring of the electrical industry within the Public Utilities Act provides for the establishment of an Independent System Operator (ISO) as a nonprofit public benefit corporation. Existing law requires the ISO to manage the transmission grid and related energy markets in a manner that is consistent with (1) making the most efficient use of available energy resources, (2) reducing, to the extent possible, overall economic cost to the state's consumers, (3) applicable state law intended to protect the public's health and the environment, and (4) maximizing the availability of existing electric generation resources necessary to meet the needs of the state's electricity consumers.

## Version chain

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

1. **02/24/12 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201120120AB2516&version=20110AB251699INT)
2. **05/14/12 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201120120AB2516&version=20110AB251698AMD)
3. **07/13/12 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201120120AB2516&version=20110AB251696CHP)
4. **AB2516** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201120120AB2516)
5. **07/02/12 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201120120AB2516&version=20110AB251697ENR)

## Votes

- Do pass. — **15–0** (pass) · lower
- Consent Calendar 2nd — **36–0** (pass) · upper
- Do pass, but re-refer to the Committee on Appropriations Recommend Consent. — **13–0** (pass) · upper
- Do pass and re-refer to Committee on Appropriations with recommendation: To Consent Calendar. — **12–0** (pass) · lower
- AB 2516 BRADFORD Assembly Third Reading — **73–0** (pass) · lower

## Sponsors

- Bradford — primary (person)

## Timeline

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

- **2012-02-24** Introduced. To print. `introduction`
- **2012-02-26** From printer. May be heard in committee March 27.
- **2012-02-27** Read first time. `reading-1`
- **2012-03-22** Referred to Com. on U. & C. `referral-committee`
- **2012-04-18** From committee: Do pass and re-refer to Com. on APPR. with recommendation: to consent calendar. (Ayes 12. Noes 0.) (April 16). Re-referred to Com. on APPR. `referral-committee, committee-passage, committee-passage-favorable`
- **2012-04-25** From committee: Do pass. (Ayes 15. Noes 0.) (April 25). `committee-passage, committee-passage-favorable`
- **2012-04-26** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2012-05-14** Read third time and amended. Ordered to third reading. (Page 4812.) `reading-3, reading-1, amendment-passage`
- **2012-05-17** Read third time. Passed. Ordered to the Senate. (Ayes 73. Noes 0. Page 4871.) `reading-3, reading-1, passage`
- **2012-05-17** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2012-05-24** Referred to Com. on E., U. & C. `referral-committee`
- **2012-06-12** From committee: Do pass and re-refer to Com. on APPR. with recommendation: to consent calendar. (Ayes 13. Noes 0.) (June 11). Re-referred to Com. on APPR. `referral-committee, committee-passage, committee-passage-favorable`
- **2012-06-25** From committee: Be placed on second reading file pursuant to Senate Rule 28.8 and ordered to consent calendar. `committee-passage`
- **2012-06-26** Read second time. Ordered to consent calendar. `reading-2, reading-1`
- **2012-06-28** Read third time. Passed. Ordered to the Assembly. (Ayes 36. Noes 0. Page 4183.). `reading-3, reading-1, passage`
- **2012-06-28** In Assembly. Ordered to Engrossing and Enrolling. `committee-passage`
- **2012-07-05** Enrolled and presented to the Governor at 11:30 a.m.
- **2012-07-13** Approved by the Governor. `executive-signature`
- **2012-07-13** Chaptered by Secretary of State - Chapter 127, Statutes of 2012.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/5985ad00-1b09-44f1-af97-d06c86adfb4e`. Confidence: reported (aggregated from official California legislature records).