---
type: "Bill"
title: "Driving under the influence: research."
description: "Existing law prohibits a person who is under the influence of alcohol, drugs, or the combined influence of alcohol or drugs from driving a vehicle. A violation of this prohibition is a crime."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20192020"
identifier: "AB 127"
citation: "California AB 127 (20192020)"
classification: ["bill"]
subjects: ["Driving under the influence: research."]
status: "enacted"
primary_sponsors: ["Lackey"]
version_count: 5
action_count: 20
vote_count: 5
first_action: "2018-12-04"
last_action: "2019-07-10"
source: "openstates"
source_identifier: "ocd-bill/84783607-23b1-436a-b385-e6aa4b45bdcf"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB127"
source_hash: "c3a8b2f95d7b9c17d616c26232cdadcf27c324e99107fd654b927498e8a76523"
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 127 (20192020) — Driving under the influence: research.

Existing law prohibits a person who is under the influence of alcohol, drugs, or the combined influence of alcohol or drugs from driving a vehicle. A violation of this prohibition is a crime.

## Version chain

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

1. **12/04/18 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB127&version=20190AB12799INT)
2. **05/14/19 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB127&version=20190AB12798AMD)
3. **07/10/19 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB127&version=20190AB12796CHP)
4. **AB127** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB127)
5. **07/02/19 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB127&version=20190AB12797ENR)

## Votes

- AB 127 Lackey Consent Calendar Second Day — **74–0** (pass) · lower
- Consent Calendar AB127 Lackey et al. Urgency Clause — **40–0** (pass) · upper
- Do pass and be ordered to the Consent Calendar — **7–0** (pass) · upper
- AB 127 Lackey Concurrence in Senate Amendments — **78–0** (pass) · lower
- Do pass. To Consent Calendar. — **8–0** (pass) · lower

## Sponsors

- Lackey — primary (person)
- Bates — coauthor (person)
- Chang — coauthor (person)
- Cooper — coauthor (person)
- Wilk — coauthor (person)

## Timeline

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

- **2018-12-04** Introduced. To print. `introduction`
- **2018-12-05** From printer. May be heard in committee January 4.
- **2019-01-07** Read first time. `reading-1`
- **2019-01-24** Referred to Com. on PUB. S. `referral-committee`
- **2019-02-26** Coauthors revised.
- **2019-02-26** From committee: Do pass. To Consent Calendar. (Ayes 8. Noes 0.) (February 26). `committee-passage-favorable, committee-passage`
- **2019-02-27** Read second time. Ordered to Consent Calendar. `reading-1, reading-2`
- **2019-03-07** Read third time. Urgency clause adopted. Passed. Ordered to the Senate. (Ayes 74. Noes 0. Page 602.). `passage, reading-3, reading-1`
- **2019-03-07** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2019-04-24** Referred to Com. on PUB. S. `referral-committee`
- **2019-05-14** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on PUB. S. `reading-1, reading-2, amendment-passage, referral-committee, amendment-introduction`
- **2019-06-04** From committee: Do pass. To Consent Calendar. (Ayes 7. Noes 0.) (June 4). `committee-passage-favorable, committee-passage`
- **2019-06-05** Read second time. Ordered to Consent Calendar. `reading-1, reading-2`
- **2019-06-06** Measure version as amended on May 14 corrected. `amendment-passage`
- **2019-06-17** Read third time. Urgency clause adopted. Passed. Ordered to the Assembly. (Ayes 40. Noes 0. Page 1605.). `passage, reading-3, reading-1`
- **2019-06-18** In Assembly. Concurrence in Senate amendments pending. May be considered on or after June 20 pursuant to Assembly Rule 77.
- **2019-07-01** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 78. Noes 0. Page 2482.). `amendment-passage, committee-passage-favorable`
- **2019-07-05** Enrolled and presented to the Governor at 3 p.m.
- **2019-07-10** Approved by the Governor. `executive-signature`
- **2019-07-10** Chaptered by Secretary of State - Chapter 68, Statutes of 2019.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/84783607-23b1-436a-b385-e6aa4b45bdcf`. Confidence: reported (aggregated from official California legislature records).