---
type: "Bill"
title: "Controlled dangerous substances; authorizing certain entities to engage in harm-reduction services; providing for registration and reporting. Emergency."
description: "Controlled dangerous substances; authorizing certain entities to engage in harm-reduction services; providing for registration and reporting. Emergency."
jurisdiction: "us/states/ok"
legislature: "Oklahoma Legislature"
session: "2021"
identifier: "SB 511"
citation: "Oklahoma SB 511 (2021)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Bush", "Montgomery"]
version_count: 6
action_count: 31
vote_count: 0
first_action: "2021-02-01"
last_action: "2021-04-20"
source: "openstates"
source_identifier: "ocd-bill/4f9b1b41-1ee1-4d3e-b9d5-54214226505b"
source_url: "http://www.oklegislature.gov/BillInfo.aspx?Bill=SB511&session=2100"
source_hash: "2dbc58387975fc849d96009873bc3a7b39e2c21dd9b65b987686f95bef30d83d"
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-ok"]
---

# Oklahoma SB 511 (2021) — Controlled dangerous substances; authorizing certain entities to engage in harm-reduction services; providing for registration and reporting. Emergency.

## Version chain

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

1. **Introduced** (filed) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 INT/SB/SB511 INT.PDF)
2. **Engrossed** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 ENGR/SB/SB511 ENGR.PDF)
3. **Enrolled (final version)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 ENR/SB/SB511 ENR.PDF)
4. **Floor (House)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 FLR/HFLR/SB511 HFLR.PDF)
5. **Floor (Senate)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 FLR/SFLR/SB511 SFLR.PDF)
6. **SB511 (2-11-21) (MONTGOMERY) FA1.PDF** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2021-22 FLOOR AMENDMENTS/Senate/SB511 (2-11-21) (MONTGOMERY) FA1.PDF)

## Sponsors

- Bush — primary (person)
- Montgomery — primary (person)

## Timeline

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

- **2021-02-01** First Reading `introduction, reading-1`
- **2021-02-01** Authored by Senator Montgomery
- **2021-02-01** Coauthored by Senator Hicks
- **2021-02-02** Second Reading referred to Health and Human Services `reading-2, referral-committee`
- **2021-02-04** Coauthored by Senator Dossett (J.A.)
- **2021-02-08** Coauthored by Representative Bush (principal House author)
- **2021-02-08** Reported Do Pass Health and Human Services committee; CR filed `committee-passage`
- **2021-02-09** coauthored by Pae
- **2021-03-02** General Order, Amended
- **2021-03-02** Measure failed: Ayes: 24 Nays: 21
- **2021-03-02** Notice served to reconsider vote on measure Montgomery
- **2021-03-03** Motion to reconsider vote adopted: Ayes: 46 Nays: 0
- **2021-03-03** Measure passed: Ayes: 28 Nays: 18 `passage`
- **2021-03-03** Emergency passed: Ayes: 36 Nays: 10
- **2021-03-03** Referred for engrossment
- **2021-03-04** Engrossed to House `passage`
- **2021-03-04** First Reading `introduction, reading-1`
- **2021-03-22** Second Reading referred to Public Health `reading-2, referral-committee`
- **2021-03-31** CR; Do Pass Public Health Committee `committee-passage`
- **2021-03-31** Coauthored by Representative(s) Waldron
- **2021-04-13** General Order
- **2021-04-13** Coauthored by Representative(s) McEntire
- **2021-04-13** Third Reading, Measure and Emergency passed: Ayes: 70 Nays: 23 `passage, reading-3`
- **2021-04-13** Signed, returned to Senate
- **2021-04-13** Referred for enrollment
- **2021-04-13** Coauthored by Representative Virgin
- **2021-04-14** Coauthored by Representative Munson
- **2021-04-14** Enrolled, to House
- **2021-04-14** Signed, returned to Senate
- **2021-04-14** Sent to Governor `executive-receipt`
- **2021-04-20** Approved by Governor 04/20/2021 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/4f9b1b41-1ee1-4d3e-b9d5-54214226505b`. Confidence: reported (aggregated from official Oklahoma legislature records).