republic-os/legislation/us/states/ca/20192020/sb-527.md

---
type: "Bill"
title: "Local government: Williamson Act: cultivation of cannabis and hemp."
description: "The California Land Conservation Act of 1965, otherwise known as the Williamson Act, authorizes a city or county to contract with a landowner to limit the use of agricultural land located in an agricultural preserve designated by the city or county. Existing law requires the board of supervisors or city council, as applicable, to adopt rules governing the administration of agricultural preserves, including rules related to compatible uses consistent with specified principles of compatibility. Existing law defines \"agricultural preserve\" for these purposes to include an area devoted to agricultural use, which is further defined as a use of land for the purpose of producing an agricultural commodity for commercial purposes."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20192020"
identifier: "SB 527"
citation: "California SB 527 (20192020)"
classification: ["bill"]
subjects: ["Local government: Williamson Act: cultivation of cannabis and hemp."]
status: "enacted"
primary_sponsors: ["Caballero"]
version_count: 6
action_count: 20
vote_count: 5
first_action: "2019-02-21"
last_action: "2019-09-06"
source: "openstates"
source_identifier: "ocd-bill/ca74233a-a47b-4442-bcca-e558f0404ff6"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200SB527"
source_hash: "d618c6bcb2321d7e31b74afdb6d57383cf5f8dff77d27bbc64768e07cb6ac805"
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 527 (20192020) — Local government: Williamson Act: cultivation of cannabis and hemp.

The California Land Conservation Act of 1965, otherwise known as the Williamson Act, authorizes a city or county to contract with a landowner to limit the use of agricultural land located in an agricultural preserve designated by the city or county. Existing law requires the board of supervisors or city council, as applicable, to adopt rules governing the administration of agricultural preserves, including rules related to compatible uses consistent with specified principles of compatibility. Existing law defines "agricultural preserve" for these purposes to include an area devoted to agricultural use, which is further defined as a use of land for the purpose of producing an agricultural commodity for commercial purposes.

## Version chain

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

1. **02/21/19 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200SB527&version=20190SB52799INT)
2. **04/23/19 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200SB527&version=20190SB52798AMD)
3. **06/17/19 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200SB527&version=20190SB52797AMD)
4. **09/06/19 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200SB527&version=20190SB52795CHP)
5. **SB527** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201920200SB527)
6. **08/27/19 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201920200SB527&version=20190SB52796ENR)

## Votes

- Do pass as amended — **5–1** (pass) · upper
- Unfinished Business SB527 Caballero Concurrence — **30–7** (pass) · upper
- SB 527 Caballero Senate Third Reading By Aguiar-Curry — **58–10** (pass) · lower
- 3rd Reading — **30–7** (pass) · upper
- Do pass. — **6–2** (pass) · lower

## Sponsors

- Caballero — primary (person)

## Timeline

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

- **2019-02-21** Introduced. Read first time. To Com. on RLS. for assignment. To print. `introduction, reading-1`
- **2019-02-22** From printer. May be acted upon on or after March 24.
- **2019-03-07** Referred to Com. on GOV. & F. `referral-committee`
- **2019-03-27** Set for hearing April 3.
- **2019-03-27** April 3 set for first hearing canceled at the request of author.
- **2019-04-04** Set for hearing April 10.
- **2019-04-22** From committee: Do pass as amended. (Ayes 5. Noes 1. Page 713.) (April 10). `committee-passage-favorable, committee-passage, amendment-passage`
- **2019-04-23** Read second time and amended. Ordered to third reading. `amendment-passage, reading-1, reading-2`
- **2019-05-09** Read third time. Passed. (Ayes 30. Noes 7. Page 1008.) Ordered to the Assembly. `passage, reading-3, reading-1`
- **2019-05-09** In Assembly. Read first time. Held at Desk. `reading-1`
- **2019-06-13** Referred to Com. on AGRI. `referral-committee`
- **2019-06-17** From committee with author's amendments. Read second time and amended. Re-referred to Com. on AGRI. `reading-1, reading-2, amendment-passage, committee-passage, referral-committee`
- **2019-07-03** From committee: Do pass. (Ayes 6. Noes 2.) (July 3). `committee-passage-favorable, committee-passage`
- **2019-07-05** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2019-08-12** Read third time. Passed. (Ayes 58. Noes 10. Page 2672.) Ordered to the Senate. `passage, reading-3, reading-1`
- **2019-08-12** In Senate. Concurrence in Assembly amendments pending.
- **2019-08-26** Assembly amendments concurred in. (Ayes 30. Noes 7. Page 2265.) Ordered to engrossing and enrolling. `amendment-passage, committee-passage-favorable`
- **2019-08-30** Enrolled and presented to the Governor at 3 p.m.
- **2019-09-06** Approved by the Governor. `executive-signature`
- **2019-09-06** Chaptered by Secretary of State. Chapter 273, Statutes of 2019.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/ca74233a-a47b-4442-bcca-e558f0404ff6`. Confidence: reported (aggregated from official California legislature records).