republic-os/legislation/us/states/ca/20112012/ab-2109.md

---
type: "Bill"
title: "Communicable disease: immunization exemption."
description: "Existing law prohibits the governing authority of a school or other institution from unconditionally admitting any person as a pupil of any private or public elementary or secondary school, child care center, day nursery, nursery school, family day care home, or development center, unless prior to his or her first admission to that institution he or she has been fully immunized against various diseases, as specified."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20112012"
identifier: "AB 2109"
citation: "California AB 2109 (20112012)"
classification: ["bill"]
subjects: ["Communicable disease: immunization exemption."]
status: "enacted"
primary_sponsors: ["Pan"]
version_count: 7
action_count: 23
vote_count: 7
first_action: "2012-02-23"
last_action: "2012-09-30"
source: "openstates"
source_identifier: "ocd-bill/c5f0b682-f0f8-4060-b79a-8890c0fa66a3"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201120120AB2109"
source_hash: "b1281a0311fd959b5c71dedfa20054358eaa506eeede5c372525cce0c329b7e8"
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 2109 (20112012) — Communicable disease: immunization exemption.

Existing law prohibits the governing authority of a school or other institution from unconditionally admitting any person as a pupil of any private or public elementary or secondary school, child care center, day nursery, nursery school, family day care home, or development center, unless prior to his or her first admission to that institution he or she has been fully immunized against various diseases, as specified.

## Version chain

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

1. **02/23/12 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201120120AB2109&version=20110AB210999INT)
2. **04/23/12 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201120120AB2109&version=20110AB210998AMD)
3. **06/20/12 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201120120AB2109&version=20110AB210997AMD)
4. **08/20/12 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201120120AB2109&version=20110AB210996AMD)
5. **09/30/12 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201120120AB2109&version=20110AB210994CHP)
6. **AB2109** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201120120AB2109)
7. **08/31/12 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201120120AB2109&version=20110AB210995ENR)

## Votes

- Do pass, but re-refer to the Committee on Appropriations. — **7–1** (pass) · upper
- Do pass. — **12–5** (pass) · lower
- AB 2109 PAN Concurrence in Senate Amendments — **51–29** (pass) · lower
- AB 2109 PAN Assembly Third Reading — **47–26** (pass) · lower
- Do pass. — **5–2** (pass) · upper
- 3rd Reading AB2109 Pan By Wolk — **22–14** (pass) · upper
- Do pass as amended and be re-referred to the Committee on Appropriations. — **13–5** (pass) · lower

## Sponsors

- Pan — primary (person)
- Fuentes — coauthor (person)
- Wolk — principal coauthor (person)

## Timeline

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

- **2012-02-23** Read first time. To print. `reading-1`
- **2012-02-24** From printer. May be heard in committee March 25.
- **2012-03-12** Referred to Com. on HEALTH. `referral-committee`
- **2012-04-19** From committee: Do pass as amended and re-refer to Com. on APPR. (Ayes 13. Noes 5.) (April 17). `amendment-passage, committee-passage, committee-passage-favorable`
- **2012-04-23** Read second time and amended. `reading-2, reading-1, amendment-passage`
- **2012-04-24** Re-referred to Com. on APPR. `referral-committee`
- **2012-05-02** From committee: Do pass. (Ayes 12. Noes 5.) (May 2). `committee-passage, committee-passage-favorable`
- **2012-05-03** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2012-05-10** Read third time. Passed. Ordered to the Senate. (Ayes 47. Noes 26. Page 4770.) `reading-3, reading-1, passage`
- **2012-05-10** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2012-05-31** Referred to Com. on HEALTH. `referral-committee`
- **2012-06-20** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on HEALTH. `reading-2, amendment-introduction, reading-1, amendment-passage, referral-committee`
- **2012-06-28** From committee: Do pass and re-refer to Com. on APPR. (Ayes 7. Noes 1.) (June 27). Re-referred to Com. on APPR. `referral-committee, committee-passage, committee-passage-favorable`
- **2012-08-07** From committee: Do pass. (Ayes 5. Noes 2.) (August 6). `committee-passage, committee-passage-favorable`
- **2012-08-08** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2012-08-20** Read third time and amended. Ordered to second reading. `reading-3, reading-1, amendment-passage`
- **2012-08-21** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2012-08-22** Read third time. Passed. Ordered to the Assembly. (Ayes 22. Noes 14. Page 4709.). `reading-3, reading-1, passage`
- **2012-08-23** In Assembly. Concurrence in Senate amendments pending. May be considered on or after August 25 pursuant to Assembly Rule 77.
- **2012-08-27** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 51. Noes 29. Page 6330.). `committee-passage-favorable, amendment-passage`
- **2012-09-06** Enrolled and presented to the Governor at 5:45 p.m.
- **2012-09-30** Approved by the Governor. `executive-signature`
- **2012-09-30** Chaptered by Secretary of State - Chapter 821, Statutes of 2012.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/c5f0b682-f0f8-4060-b79a-8890c0fa66a3`. Confidence: reported (aggregated from official California legislature records).