---
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 defendant is released from incarceration and is subject to specified conditions and supervision by county probation authorities."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20152016"
identifier: "SB 266"
citation: "California SB 266 (20152016)"
classification: ["bill"]
subjects: ["Probation and mandatory supervision: flash incarceration."]
status: "enacted"
primary_sponsors: ["Block"]
version_count: 7
action_count: 21
vote_count: 5
first_action: "2015-02-19"
last_action: "2016-09-27"
source: "openstates"
source_identifier: "ocd-bill/1b8e4f05-752a-4cb6-8b03-fb9bcfa4fd13"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201520160SB266"
source_hash: "ec81da626362f70d80e619dda156f144876749f91f7cd4d8f8efe6ea0f8fb5a0"
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 SB 266 (20152016) — Probation and mandatory supervision: flash incarceration.

Existing law authorizes probation and mandatory supervision, which in each case is a period of time when a defendant is released from incarceration and is subject to specified conditions and supervision by county probation authorities.

## Version chain

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

1. **02/19/15 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB266&version=20150SB26699INT)
2. **04/07/15 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB266&version=20150SB26698AMD)
3. **06/02/16 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB266&version=20150SB26697AMD)
4. **06/27/16 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB266&version=20150SB26696AMD)
5. **09/27/16 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB266&version=20150SB26694CHP)
6. **SB266** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201520160SB266)
7. **08/26/16 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201520160SB266&version=20150SB26695ENR)

## Votes

- Do pass as amended. — **7–0** (pass) · lower
- 3rd Reading — **36–1** (pass) · upper
- Do pass as amended — **7–0** (pass) · upper
- SB 266 Block Senate Third Reading By STONE — **79–0** (pass) · lower
- Unfinished Business SB266 Block Concurrence — **39–0** (pass) · upper

## Sponsors

- Block — primary (person)
- Anderson — coauthor (person)

## Timeline

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

- **2015-02-19** Introduced. Read first time. To Com. on RLS. for assignment. To print. `introduction, reading-1`
- **2015-02-20** From printer. May be acted upon on or after March 22.
- **2015-03-05** Referred to Com. on PUB. S. `referral-committee`
- **2015-03-11** Set for hearing March 24.
- **2015-04-06** From committee: Do pass as amended. (Ayes 7. Noes 0. Page 405.) (March 24). `committee-passage-favorable, committee-passage, amendment-passage`
- **2015-04-07** Read second time and amended. Ordered to third reading. `amendment-passage, reading-2, reading-1`
- **2015-04-09** Read third time. Passed. (Ayes 36. Noes 1. Page 532.) Ordered to the Assembly. `reading-3, passage, reading-1`
- **2015-04-09** In Assembly. Read first time. Held at Desk. `reading-1`
- **2015-05-14** Referred to Com. on PUB. S. `referral-committee`
- **2015-06-16** June 16 set for first hearing canceled at the request of author.
- **2015-06-30** June 30 set for second hearing canceled at the request of author.
- **2016-06-02** From committee with author's amendments. Read second time and amended. Re-referred to Com. on PUB. S. `referral-committee, reading-2, amendment-passage, committee-passage, reading-1`
- **2016-06-23** From committee: Do pass as amended. (Ayes 7. Noes 0.) (June 21). `committee-passage-favorable, committee-passage, amendment-passage`
- **2016-06-27** Read second time and amended. Ordered to second reading. `amendment-passage, reading-2, reading-1`
- **2016-06-28** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2016-08-18** Read third time. Passed. (Ayes 79. Noes 0. Page 5878.) Ordered to the Senate. `reading-3, passage, reading-1`
- **2016-08-19** In Senate. Concurrence in Assembly amendments pending.
- **2016-08-24** Assembly amendments concurred in. (Ayes 39. Noes 0. Page 5324.) Ordered to engrossing and enrolling. `committee-passage-favorable, amendment-passage`
- **2016-08-30** Enrolled and presented to the Governor at 1:30 p.m.
- **2016-09-27** Approved by the Governor. `executive-signature`
- **2016-09-27** Chaptered by Secretary of State. Chapter 706, Statutes of 2016.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/1b8e4f05-752a-4cb6-8b03-fb9bcfa4fd13`. Confidence: reported (aggregated from official California legislature records).