---
type: "Bill"
title: "Nitrous oxide; Maddix Bias Act; definition; sale of nitrous oxide to persons under twenty-one; legal age; enforcement; penalty; imprisonment; effective date."
description: "Nitrous oxide; Maddix Bias Act; definition; sale of nitrous oxide to persons under twenty-one; legal age; enforcement; penalty; imprisonment; effective date."
jurisdiction: "us/states/ok"
legislature: "Oklahoma Legislature"
session: "2026"
identifier: "HB 1933"
citation: "Oklahoma HB 1933 (2026)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Sterling", "Weaver"]
version_count: 10
action_count: 41
vote_count: 7
first_action: "2025-02-03"
last_action: "2026-05-11"
source: "openstates"
source_identifier: "ocd-bill/8048f625-f001-41b5-9e45-93ead262ec57"
source_url: "http://www.oklegislature.gov/BillInfo.aspx?Bill=HB1933&session=2600"
source_hash: "a4f57a28147977d025595dcb4eb6f6e8fab7c9f1f3a291c0012bd5770cb09a5d"
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 HB 1933 (2026) — Nitrous oxide; Maddix Bias Act; definition; sale of nitrous oxide to persons under twenty-one; legal age; enforcement; penalty; imprisonment; effective date.

## Version chain

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

1. **Introduced** (filed) — [source](https://www.oklegislature.gov/cf_pdf/2025-26 INT/hB/HB1933 INT.PDF)
2. **Amended And Engrossed** (committee substitute) — [source](https://www.oklegislature.gov/cf_pdf/2025-26 AMENDMENTS/Amendment and Engr/HB1933 SAHB AND ENGR.PDF)
3. **Engrossed** (committee substitute) — [source](https://www.oklegislature.gov/cf_pdf/2025-26 ENGR/hB/HB1933 ENGR.PDF)
4. **Enrolled (final version)** (committee substitute) — [source](https://www.oklegislature.gov/cf_pdf/2025-26 ENR/hB/HB1933 ENR.PDF)
5. **Floor (House)** (committee substitute) — [source](https://www.oklegislature.gov/cf_pdf/2025-26 FLR/HFLR/HB1933 HFLR.PDF)
6. **Floor (Senate)** (committee substitute) — [source](https://www.oklegislature.gov/cf_pdf/2025-26 FLR/SFLR/HB1933 SFLR.PDF)
7. **HB1933 (4-16-26) (WEAVER) FA1.PDF** (committee substitute) — [source](https://www.oklegislature.gov/cf_pdf/2025-26 FLOOR AMENDMENTS/Senate/HB1933 (4-16-26) (WEAVER) FA1.PDF)
8. **House Committee Substitute** (committee substitute) — [source](https://www.oklegislature.gov/cf_pdf/2025-26 COMMITTEE SUBS/HCS/HB1933 CS.PDF)
9. **Policy Committee Recommendation** (committee substitute) — [source](https://www.oklegislature.gov/cf_pdf/2025-26 COMMITTEE SUBS/HCS/HB1933 POLREC.PDF)
10. **Proposed Policy Committee Substitute 1** (committee substitute) — [source](https://www.oklegislature.gov/cf_pdf/2025-26 COMMITTEE AMENDMENTS/House/HB1933 POLPCS1 DANNY STERLING-TJ.PDF)

## Votes

- Health And Human Services Oversight Committee: Do Pass As Amended By Cs — **14–0** (pass) · lower
- Health & Human Services — **9–1** (pass) · upper
- Third Reading — **45–0** (pass) · upper
- Fourth Reading — **90–0** (pass) · lower
- Alcohol, Tobacco And Controlled Substances Committee: Do Pass As Amended By Cs — **5–0** (pass) · lower
- Third Reading — **89–0** (pass) · lower
- Third Reading — **47–0** (pass) · upper

## Sponsors

- Sterling — primary (person)
- Weaver — primary (person)

## Timeline

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

- **2025-02-03** First Reading `introduction, reading-1`
- **2025-02-03** Authored by Representative Sterling
- **2025-02-04** Second Reading referred to Health and Human Services Oversight `reading-2, referral-committee`
- **2025-02-04** Referred to Alcohol, Tobacco and Controlled Substances `referral-committee`
- **2025-02-24** Policy recommendation to the Health and Human Services Oversight committee; Do Pass, amended by committee substitute Alcohol, Tobacco and Controlled Substances `committee-passage`
- **2025-02-24** Authored by Senator Weaver (principal Senate author)
- **2025-03-06** CR; Do Pass, amended by committee substitute Health and Human Services Oversight Committee `committee-passage`
- **2025-03-13** General Order
- **2025-03-13** Third Reading, Measure passed: Ayes: 89 Nays: 0 `passage, reading-3`
- **2025-03-13** Referred for engrossment
- **2025-03-17** Engrossed, signed, to Senate `passage`
- **2025-03-17** First Reading `introduction, reading-1`
- **2025-03-17** Coauthored by Senator Frix
- **2025-04-01** Second Reading referred to Health and Human Services `reading-2, referral-committee`
- **2025-04-03** Coauthored by Senator Jett
- **2025-04-21** Reported Do Pass Health and Human Services committee; CR filed `committee-passage`
- **2025-04-23** Placed on General Order
- **2026-04-13** Coauthored by Senator McIntosh
- **2026-04-15** General Order, Considered
- **2026-04-15** Measure passed: Ayes: 45 Nays: 0 `passage`
- **2026-04-15** Engrossed measure signed, returned to House `passage`
- **2026-04-15** Referred for enrollment
- **2026-04-16** Recalled from enrollment
- **2026-04-16** Returned to Senate
- **2026-04-20** Signing rescinded
- **2026-04-20** Third Reading and advancement rescinded `reading-3`
- **2026-04-20** Backed up to General Order
- **2026-04-20** Senate Rule suspended
- **2026-04-20** General Order, Amended
- **2026-04-20** Measure passed: Ayes: 47 Nays: 0 `passage`
- **2026-04-20** Referred for engrossment
- **2026-04-21** Engrossed to House `passage`
- **2026-04-21** SA's received
- **2026-05-04** SA's read, adopted
- **2026-05-04** Coauthored by Representative(s) Provenzano
- **2026-05-04** Fourth Reading, Measure passed: Ayes: 90 Nays: 0 `passage`
- **2026-05-04** Referred for enrollment
- **2026-05-05** Enrolled, signed, to Senate
- **2026-05-05** Enrolled measure signed, returned to House
- **2026-05-05** Sent to Governor `executive-receipt`
- **2026-05-11** Approved by Governor 05/11/2026 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/8048f625-f001-41b5-9e45-93ead262ec57`. Confidence: reported (aggregated from official Oklahoma legislature records).