republic-os/legislation/us/states/ca/20092010/ab-1929.md

---
type: "Bill"
title: "Invasive aquatic species: mussels."
description: "Existing law, until January 1, 2012, generally prohibits a person from possessing, importing, shipping, or transporting in the state, or from placing, planting, or causing to be placed or planted in any water within the state, dreissenid mussels, and authorizes the Director of Fish and Game or his or her designee to engage in various enforcement activities. Existing law exempts a public or private agency that operates a water supply system from those enforcement activities, if the operator of the facilities has prepared and implemented a prescribed plan to control or eradicate dreissenid mussels."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20092010"
identifier: "AB 1929"
citation: "California AB 1929 (20092010)"
classification: ["bill"]
subjects: ["Invasive aquatic species: mussels."]
status: "enacted"
primary_sponsors: ["Hall"]
version_count: 4
action_count: 19
vote_count: 6
first_action: "2010-02-17"
last_action: "2010-08-18"
source: "openstates"
source_identifier: "ocd-bill/0810821a-92c8-4637-bbbf-184ca7337ebb"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=200920100AB1929"
source_hash: "013c6918ee990863387a492237056f7d9ee0a4aad80d62f201833753200dac15"
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 1929 (20092010) — Invasive aquatic species: mussels.

Existing law, until January 1, 2012, generally prohibits a person from possessing, importing, shipping, or transporting in the state, or from placing, planting, or causing to be placed or planted in any water within the state, dreissenid mussels, and authorizes the Director of Fish and Game or his or her designee to engage in various enforcement activities. Existing law exempts a public or private agency that operates a water supply system from those enforcement activities, if the operator of the facilities has prepared and implemented a prescribed plan to control or eradicate dreissenid mussels.

## Version chain

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

1. **02/17/10 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200920100AB1929&version=20090AB192999INT)
2. **08/18/10 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200920100AB1929&version=20090AB192997CHP)
3. **AB1929** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=200920100AB1929)
4. **08/06/10 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200920100AB1929&version=20090AB192998ENR)

## Votes

- Do pass, to Consent Calendar. — **pass** (pass) · lower
- Do pass, but re-refer to the Committee on Appropriations Recommend Consent. — **pass** (pass) · upper
- Do pass and be re-referred to the Committee on Judiciary to Consent Calendar. — **pass** (pass) · lower
- AB 1929 HALL Consent Calendar Second Day Regular Session — **pass** (pass) · lower
- Do pass and re-refer to Committee on Appropriations with recommendation: To Consent Calendar. — **pass** (pass) · lower
- Consent Calendar 2nd AB1929 Hall — **pass** (pass) · upper

## Sponsors

- Hall — primary (person)

## Timeline

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

- **2010-02-17** Read first time. To print. `reading-1`
- **2010-02-18** From printer. May be heard in committee March 20.
- **2010-03-04** Referred to Coms. on W.,P. & W. and JUD. `referral-committee`
- **2010-03-23** From committee: Do pass, and re-refer to Com. on JUD. with recommendation: To Consent Calendar. Re-referred. (Ayes 12. Noes 0.) (March 23). `committee-passage-favorable, committee-passage`
- **2010-04-06** From committee: Do pass, and re-refer to Com. on APPR. with recommendation: To Consent Calendar. Re-referred. (Ayes 9. Noes 0.) (April 6). `committee-passage-favorable, committee-passage`
- **2010-04-14** From committee: Do pass. To Consent Calendar. (April 14). `committee-passage-favorable, committee-passage`
- **2010-04-15** Read second time. To Consent Calendar. `reading-2, reading-1`
- **2010-04-22** Read third time, passed, and to Senate. (Ayes 74. Noes 0. Page 4819.) `reading-3, passage, reading-1`
- **2010-04-22** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2010-05-06** Referred to Com. on N.R. & W. `referral-committee`
- **2010-06-16** In committee: Hearing postponed by committee.
- **2010-06-29** From committee: Do pass, and re-refer to Com. on APPR with recommendation: To Consent Calendar. Re-referred. (Ayes 9. Noes 0.) (June 29). `committee-passage-favorable, committee-passage`
- **2010-08-02** From committee: Be placed on second reading file pursuant to Senate Rule 28.8 and to Consent Calendar. `committee-passage`
- **2010-08-03** Read second time. To Consent Calendar. `reading-2, reading-1`
- **2010-08-05** Read third time, passed, and to Assembly. (Ayes 33. Noes 0. Page 4375.) `reading-3, passage, reading-1`
- **2010-08-05** In Assembly. To enrollment.
- **2010-08-09** Enrolled and to the Governor at 4:50 p.m.
- **2010-08-18** Approved by the Governor. `executive-signature`
- **2010-08-18** Chaptered by Secretary of State - Chapter 152, Statutes of 2010.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/0810821a-92c8-4637-bbbf-184ca7337ebb`. Confidence: reported (aggregated from official California legislature records).