---
type: "Bill"
title: "Natural Resources - Vessels - Carbon Monoxide Warning Labels (Matthew's Law)"
description: "Natural Resources - Vessels - Carbon Monoxide Warning Labels (Matthew's Law)"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2025"
identifier: "HB 1322"
citation: "Maryland HB 1322 (2025)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Allen", "Behler", "Boyce", "Cullison", "Davis", "Feldmark", "Foley", "Guyton", "Guzzone", "Healey", "Hill", "Lehman", "Pena-Melnyk", "R. Lewis", "Ruth", "Stein", "Stewart", "Terrasa", "Woorman", "Ziegler"]
version_count: 4
action_count: 15
vote_count: 3
first_action: "2025-02-07"
last_action: "2025-05-13"
source: "openstates"
source_identifier: "ocd-bill/aa615924-cc56-4c09-894b-260c87bc7a2b"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/hb1322?ys=2025RS&search=True"
source_hash: "6db18860f4fb28c0a16f650429e0f22f8245a96c3fd7df30e2e77caf974a9086"
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-md"]
---

# Maryland HB 1322 (2025) — Natural Resources - Vessels - Carbon Monoxide Warning Labels (Matthew's Law)

## Version chain

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

1. **Chapter - Natural Resources - Vessels - Carbon Monoxide Warning Labels (Matthew's Law)** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/Chapters_noln/CH_451_hb1322e.pdf)
2. **Enrolled - Natural Resources - Vessels - Carbon Monoxide Warning Labels (Matthew's Law)** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/bills/hb/hb1322e.pdf)
3. **First - Natural Resources - Vessels - Carbon Monoxide Warning Labels** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/bills/hb/hb1322f.pdf)
4. **Third - Natural Resources - Vessels - Carbon Monoxide Warning Labels (Matthew's Law)** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/bills/hb/hb1322t.pdf)

## Votes

- On Third Reading (Amend) — **44–0** (pass) · upper
- On Third Reading and Final Passage (Hse concurred) — **138–1** (pass) · lower
- On Third Reading — **135–4** (pass) · lower

## Sponsors

- Allen — primary (person)
- Behler — primary (person)
- Boyce — primary (person)
- Cullison — primary (person)
- Davis — primary (person)
- Feldmark — primary (person)
- Foley — primary (person)
- Guyton — primary (person)
- Guzzone — primary (person)
- Healey — primary (person)
- Hill — primary (person)
- Lehman — primary (person)
- Pena-Melnyk — primary (person)
- R. Lewis — primary (person)
- Ruth — primary (person)
- Stein — primary (person)
- Stewart — primary (person)
- Terrasa — primary (person)
- Woorman — primary (person)
- Ziegler — primary (person)

## Timeline

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

- **2025-02-07** First Reading Environment and Transportation `referral-committee`
- **2025-02-07** Hearing 3/05 at 1:00 p.m.
- **2025-03-12** Favorable with Amendments Report by Environment and Transportation `committee-passage-favorable`
- **2025-03-13** Favorable with Amendments { `committee-passage-favorable`
- **2025-03-13** Second Reading Passed with Amendments
- **2025-03-13** Third Reading Passed `passage`
- **2025-03-17** Referred Education, Energy, and the Environment `referral-committee`
- **2025-04-03** Favorable with Amendments Report by Education, Energy, and the Environment `committee-passage-favorable`
- **2025-04-03** Favorable with Amendments { `committee-passage-favorable`
- **2025-04-03** Second Reading Passed with Amendments
- **2025-04-04** Third Reading Passed `passage`
- **2025-04-07** House Concurs Senate Amendments
- **2025-04-07** Third Reading Passed `passage`
- **2025-04-07** Passed Enrolled
- **2025-05-13** Approved by the Governor - Chapter 451 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/aa615924-cc56-4c09-894b-260c87bc7a2b`. Confidence: reported (aggregated from official Maryland legislature records).