---
type: "Bill"
title: "Probation and mandatory supervision: flash incarceration."
description: "Existing law authorizes probation and mandatory supervision, which in each case is a period of time when a person is released from incarceration and is subject to specified conditions and supervision by county probation authorities. Existing law, until January 1, 2021, allows a court to authorize the use of flash incarceration, as defined, to detain a person in county jail for not more than 10 days for a violation of the conditions of that person's probation or mandatory supervision, as specified."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20192020"
identifier: "AB 597"
citation: "California AB 597 (20192020)"
classification: ["bill"]
subjects: ["Probation and mandatory supervision: flash incarceration."]
status: "enacted"
primary_sponsors: ["Levine"]
version_count: 5
action_count: 17
vote_count: 4
first_action: "2019-02-14"
last_action: "2019-07-01"
source: "openstates"
source_identifier: "ocd-bill/1558f105-1ae8-47e2-9ca3-28f7504fe4f3"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB597"
source_hash: "cc3af9429198245cd814032d806e4e03442707d68a9ad241b1045faf9f1dac5d"
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 597 (20192020) — Probation and mandatory supervision: flash incarceration.

Existing law authorizes probation and mandatory supervision, which in each case is a period of time when a person is released from incarceration and is subject to specified conditions and supervision by county probation authorities. Existing law, until January 1, 2021, allows a court to authorize the use of flash incarceration, as defined, to detain a person in county jail for not more than 10 days for a violation of the conditions of that person's probation or mandatory supervision, as specified.

## Version chain

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

1. **02/14/19 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB597&version=20190AB59799INT)
2. **03/21/19 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB597&version=20190AB59798AMD)
3. **07/01/19 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB597&version=20190AB59796CHP)
4. **AB597** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200AB597)
5. **06/21/19 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200AB597&version=20190AB59797ENR)

## Votes

- Do pass — **6–0** (pass) · upper
- Do pass as amended. To Consent Calendar. — **8–0** (pass) · lower
- Special Consent AB597 — **40–0** (pass) · upper
- AB 597 Levine Consent Calendar Second Day — **72–0** (pass) · lower

## Sponsors

- Levine — primary (person)

## Timeline

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

- **2019-02-14** Read first time. To print. `reading-1`
- **2019-02-15** From printer. May be heard in committee March 17.
- **2019-02-25** Referred to Com. on PUB. S. `referral-committee`
- **2019-03-20** From committee: Amend, and do pass as amended. To Consent Calendar. (Ayes 8. Noes 0.) (March 19). `amendment-passage, committee-passage, amendment-introduction`
- **2019-03-21** Read second time and amended. Ordered returned to second reading. `amendment-passage, reading-1, reading-2`
- **2019-03-25** Read second time. Ordered to Consent Calendar. `reading-1, reading-2`
- **2019-03-28** Read third time. Passed. Ordered to the Senate. (Ayes 72. Noes 0. Page 918.) `passage, reading-3, reading-1`
- **2019-03-28** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2019-04-24** Referred to Com. on PUB. S. `referral-committee`
- **2019-06-04** From committee: Do pass. (Ayes 6. Noes 0.) (June 4). `committee-passage-favorable, committee-passage`
- **2019-06-05** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2019-06-17** Ordered to special consent calendar.
- **2019-06-20** Read third time. Passed. Ordered to the Assembly. (Ayes 40. Noes 0. Page 1678.). `passage, reading-3, reading-1`
- **2019-06-20** In Assembly. Ordered to Engrossing and Enrolling. `committee-passage`
- **2019-06-25** Enrolled and presented to the Governor at 11 a.m.
- **2019-07-01** Approved by the Governor. `executive-signature`
- **2019-07-01** Chaptered by Secretary of State - Chapter 44, Statutes of 2019.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/1558f105-1ae8-47e2-9ca3-28f7504fe4f3`. Confidence: reported (aggregated from official California legislature records).