---
type: "Bill"
title: "Vehicles: studded pneumatic tires."
description: "Vehicles: studded pneumatic tires."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20072008"
identifier: "AB 1971"
citation: "California AB 1971 (20072008)"
classification: ["bill"]
subjects: ["Vehicles: studded pneumatic tires."]
status: "enacted"
primary_sponsors: ["Portantino"]
version_count: 8
action_count: 25
vote_count: 6
first_action: "2008-02-14"
last_action: "2008-08-01"
source: "openstates"
source_identifier: "ocd-bill/9c4dd5df-bb63-4465-bd46-adb65ab04f6c"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=200720080AB1971"
source_hash: "9ba72024ccbb9b78a80114ecc867bbd41db8e775dba3d137033cfe7605b5f63e"
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 1971 (20072008) — Vehicles: studded pneumatic tires.

## Version chain

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

1. **02/14/08 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB1971&version=20070AB197199INT)
2. **04/16/08 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB1971&version=20070AB197198AMD)
3. **05/05/08 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB1971&version=20070AB197197AMD)
4. **06/12/08 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB1971&version=20070AB197196AMD)
5. **07/02/08 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB1971&version=20070AB197195AMD)
6. **08/01/08 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB1971&version=20070AB197193CHP)
7. **AB1971** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=200720080AB1971)
8. **07/16/08 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB1971&version=20070AB197194ENR)

## Votes

- AB 1971 PORTANTINO Concurrence in Senate Amendments — **pass** (pass) · lower
- AB 1971 PORTANTINO Consent Calendar Second Day Regular Session — **pass** (pass) · lower
- Do pass as amended, but re-refer to the Committee on Appropriations Recommend Consent. — **pass** (pass) · upper
- Do pass as amended, to Consent Calendar. — **pass** (pass) · lower
- Assembly 3rd Reading AB1971 Portantino By Ashburn — **pass** (pass) · upper
- Do pass as amended, to Consent Calendar. — **pass** (pass) · lower

## Sponsors

- Portantino — primary (person)

## Timeline

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

- **2008-02-14** Read first time. To print. `reading-1`
- **2008-02-15** From printer. May be heard in committee March 16.
- **2008-02-28** Referred to Standing Committee on Transportation. `referral-committee`
- **2008-03-24** In committee: Set, first hearing. Hearing canceled at the request of author.
- **2008-04-15** From committee: Amend, and do pass as amended. To Consent Calendar. (April 14). `amendment-introduction, committee-passage, amendment-passage`
- **2008-04-16** Read second time and amended. Ordered returned to second reading. `reading-1, reading-2, amendment-passage`
- **2008-04-17** Read second time. To Consent Calendar. `reading-1, reading-2`
- **2008-04-17** Re-referred to Standing Committee on Appropriations pursuant to Joint Rule 10.5. `referral-committee`
- **2008-05-01** From committee: Amend, and do pass as amended. To Consent Calendar. (April 30). `amendment-introduction, committee-passage, amendment-passage`
- **2008-05-05** Read second time and amended. Ordered returned to second reading. `reading-1, reading-2, amendment-passage`
- **2008-05-06** Read second time. To Consent Calendar. `reading-1, reading-2`
- **2008-05-08** Read third time, passed, and to Senate. (Ayes 75. Noes 0. Page 5061.) `passage, reading-1, reading-3`
- **2008-05-08** In Senate. Read first time. To Standing Committee on Rules for assignment. `reading-1`
- **2008-05-15** Referred to Standing Committee on Transportation and Housing. `referral-committee`
- **2008-06-11** From committee: Amend, and do pass as amended, and re-refer to Standing Committee on Appropriations with recommendation: To Consent Calendar. (Ayes 12. Noes 0.) . `amendment-introduction, committee-passage, amendment-passage, referral-committee`
- **2008-06-12** Read second time, amended, and re-referred to Standing Committee on Appropriations. `reading-2, reading-1, amendment-passage, referral-committee`
- **2008-07-01** From committee: Be placed on second reading file pursuant to Senate Rule 28.8 and be amended. `committee-passage, amendment-passage`
- **2008-07-02** Read second time, amended, and to third reading. `reading-1, reading-2, amendment-passage`
- **2008-07-10** Read third time, passed, and to Assembly. (Ayes 35. Noes 0. Page 4684.) `passage, reading-1, reading-3`
- **2008-07-14** In Assembly. Concurrence in Senate amendments pending. May be considered on or after July 16 pursuant to Assembly Rule 77.
- **2008-07-15** Assembly Rule 77 suspended. (Page 6120.)
- **2008-07-15** Senate amendments concurred in. To enrollment. (Ayes 76. Noes 0. Page 6127.) `committee-passage-favorable, amendment-passage`
- **2008-07-22** Enrolled and to the Governor at 12:30 p.m.
- **2008-08-01** Approved by the Governor. `executive-signature`
- **2008-08-01** Chaptered by Secretary of State - Chapter 220, Statutes of 2008.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/9c4dd5df-bb63-4465-bd46-adb65ab04f6c`. Confidence: reported (aggregated from official California legislature records).