---
type: "Bill"
title: "State data centers."
description: "State data centers."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20012002"
identifier: "AB 1559"
citation: "California AB 1559 (20012002)"
classification: ["bill", "appropriation"]
subjects: ["State data centers."]
status: "enacted"
primary_sponsors: ["Diaz"]
version_count: 11
action_count: 30
vote_count: 7
first_action: "2001-02-23"
last_action: "2002-05-20"
source: "openstates"
source_identifier: "ocd-bill/6af35564-9f30-4f95-90b6-4ef5a0f0ead2"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=200120020AB1559"
source_hash: "5cd2c7c8b447c534230aded6e2338d84089a3f65669c85b400d02b517b6c6fdf"
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 1559 (20012002) — State data centers.

## Version chain

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

1. **02/23/01 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200120020AB1559&version=20010AB155999INT)
2. **02/05/02 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200120020AB1559&version=20010AB155995AMD)
3. **04/10/02 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200120020AB1559&version=20010AB155994AMD)
4. **04/17/01 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200120020AB1559&version=20010AB155998AMD)
5. **04/18/02 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200120020AB1559&version=20010AB155993AMD)
6. **04/25/02 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200120020AB1559&version=20010AB155992AMD)
7. **05/20/02 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200120020AB1559&version=20010AB155990CHP)
8. **05/31/01 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200120020AB1559&version=20010AB155997AMD)
9. **06/20/01 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200120020AB1559&version=20010AB155996AMD)
10. **AB1559** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=200120020AB1559)
11. **05/06/02 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200120020AB1559&version=20010AB155991ENR)

## Votes

- Do pass as amended, and re-refer to the Committee on Appropriations. — **pass** (pass) · upper
- Do pass. — **pass** (pass) · upper
- AB 1559 Diaz Concurrence- Urgency Added — **pass** (pass) · lower
- Assembly 3rd Reading AB1559 Diaz By Machado Urgency Clause — **pass** (pass) · upper
- Do pass as amended and be re-referred to the Committee on Appropriations. — **pass** (pass) · lower
- Do pass as amended. — **pass** (pass) · lower
- AB 1559 Diaz Assembly Third Reading — **pass** (pass) · lower

## Sponsors

- Diaz — primary (person)
- Cohn — coauthor (person)
- Dutra — author (person)
- Reyes — author (person)

## Timeline

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

- **2002-05-20** Chaptered by Secretary of State - Chapter 45, Statutes of 2002.
- **2002-05-19** Approved by the Governor. `executive-signature`
- **2002-05-07** Enrolled and to the Governor at 2:30 p.m.
- **2002-05-06** Urgency clause adopted. Senate amendments concurred in. To enrollment. (Ayes 73. Noes 0. Page 5930.) `committee-passage-favorable, amendment-passage`
- **2002-05-02** In Assembly. Concurrence in Senate amendments pending. May be considered on or after May 4 pursuant to Assembly Rule 77.
- **2002-05-02** Read third time. Urgency clause adopted. Passed and to Assembly. (Ayes 29. Noes 1. Page 4043.) `passage, reading-1, reading-3`
- **2002-05-01** Read second time. To third reading. `reading-2, reading-1`
- **2002-04-30** From committee: Do pass. (Ayes 9. Noes 0.) (April 30). `committee-passage-favorable, committee-passage`
- **2002-04-25** From committee: Amend, do pass as amended, and re-refer to Standing Committee on Appropriations (Ayes 10. Noes 2.). Read second time, amended, and re-referred to Standing Committee on Appropriations. `reading-1, referral-committee, committee-passage, reading-2, amendment-introduction, amendment-passage`
- **2002-04-18** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Governmental Organization. `reading-1, referral-committee, reading-2, amendment-introduction, amendment-passage`
- **2002-04-10** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Governmental Organization. `reading-1, referral-committee, reading-2, amendment-introduction, amendment-passage`
- **2002-02-25** In committee: Set, second hearing. Hearing canceled at the request of author.
- **2002-02-05** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Governmental Organization. `reading-1, referral-committee, reading-2, amendment-introduction, amendment-passage`
- **2001-06-26** In committee: Set, first hearing. Hearing canceled at the request of author.
- **2001-06-20** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Governmental Organization. `reading-1, referral-committee, reading-2, amendment-introduction, amendment-passage`
- **2001-06-12** Referred to Standing Committee on Governmental Organization. `referral-committee`
- **2001-06-08** (Corrected June 7. )
- **2001-06-07** (Corrected June 6. )
- **2001-06-06** In Senate. Read first time. To Standing Committee on Rules for assignment. `reading-1`
- **2001-06-05** Read third time, passed, and to Senate. (Ayes 74. Noes 0. Page 2191.) `passage, reading-1, reading-3`
- **2001-06-04** Read second time. To third reading. `reading-2, reading-1`
- **2001-05-31** From committee: Amend, and do pass as amended. (Ayes 21. Noes 0.) (May 31). Read second time and amended. Ordered returned to second reading. `reading-2, reading-1, committee-passage, amendment-introduction, amendment-passage`
- **2001-05-29** Joint Rule 62(a), file notice waived. (Page 1856.)
- **2001-05-09** In committee: Set, first hearing. Referred to Standing Committee on Appropriations suspense file. `referral-committee`
- **2001-04-24** Re-referred to Standing Committee on Appropriations. `referral-committee`
- **2001-04-17** Read second time and amended. `reading-2, amendment-passage, reading-1`
- **2001-04-16** From committee: Amend, do pass as amended, and re-refer to Standing Committee on Appropriations (Ayes 9. Noes 0.) (April 3). `amendment-introduction, referral-committee, committee-passage, amendment-passage`
- **2001-03-19** Referred to Standing Committee on Jobs, Economic Development and the Economy. `referral-committee`
- **2001-02-26** From printer. May be heard in committee March 28. Read first time. `reading-1`
- **2001-02-23** Introduced. To print. `introduction`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/6af35564-9f30-4f95-90b6-4ef5a0f0ead2`. Confidence: reported (aggregated from official California legislature records).