---
type: "Bill"
title: "Controlled Hazardous Substance Facility Permit - Research Facilities - Chemical Warfare Material Requirements"
description: "Controlled Hazardous Substance Facility Permit - Research Facilities - Chemical Warfare Material Requirements"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2025"
identifier: "SB 253"
citation: "Maryland SB 253 (2025)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: []
version_count: 4
action_count: 23
vote_count: 3
first_action: "2024-10-04"
last_action: "2025-05-13"
source: "openstates"
source_identifier: "ocd-bill/6ec87fcf-dde1-4964-88cc-9684c4216741"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/sb0253?ys=2025RS&search=True"
source_hash: "b1bbde1697812a67ca302b3cc78c8b249762df939bf02273dfb9c35a8b6ffbc5"
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 SB 253 (2025) — Controlled Hazardous Substance Facility Permit - Research Facilities - Chemical Warfare Material Requirements

## Version chain

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

1. **Chapter - Controlled Hazardous Substance Facility Permit - Research Facilities - Chemical Warfare Material Requirements** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/Chapters_noln/CH_445_sb0253e.pdf)
2. **Enrolled - Controlled Hazardous Substance Facility Permit - Research Facilities - Chemical Warfare Material Requirements** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/bills/sb/sb0253e.pdf)
3. **First - Controlled Hazardous Substance Facility Permit - Research Facilities - Chemical Warfare Material Requirements** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/bills/sb/sb0253f.pdf)
4. **Third - Controlled Hazardous Substance Facility Permit - Research Facilities - Chemical Warfare Material Requirements** (committee substitute) — [source](http://mgaleg.maryland.gov/2025RS/bills/sb/sb0253t.pdf)

## Votes

- Bill is on Third Reading for Final Passage. — **43–0** (pass) · upper
- On Third Reading (Amend) — **132–5** (pass) · lower
- On Third Reading — **47–0** (pass) · upper

## Sponsors

- Chair, Education, Energy, and the Environment Committee — primary (organization)

## Timeline

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

- **2024-10-04** Pre-filed `introduction`
- **2025-01-08** First Reading Education, Energy, and the Environment `referral-committee`
- **2025-01-14** Hearing 1/23 at 1:00 p.m.
- **2025-01-15** Hearing canceled
- **2025-01-15** Hearing 1/29 at 1:00 p.m.
- **2025-01-15** Hearing canceled
- **2025-01-15** Hearing 1/29 at 1:30 p.m.
- **2025-01-23** Hearing canceled
- **2025-01-23** Hearing 1/29 at 2:30 p.m.
- **2025-03-11** Favorable with Amendments Report by Education, Energy, and the Environment `committee-passage-favorable`
- **2025-03-12** Favorable with Amendments { `committee-passage-favorable`
- **2025-03-12** Second Reading Passed with Amendments
- **2025-03-12** Third Reading Passed `passage`
- **2025-03-13** Referred Environment and Transportation `referral-committee`
- **2025-03-19** Hearing 3/26 at 1:00 p.m.
- **2025-04-03** Favorable with Amendments Report by Environment and Transportation `committee-passage-favorable`
- **2025-04-03** Favorable with Amendments { `committee-passage-favorable`
- **2025-04-03** Second Reading Passed with Amendments
- **2025-04-03** Third Reading Passed `passage`
- **2025-04-05** Senate Concurs House Amendments
- **2025-04-05** Third Reading Passed `passage`
- **2025-04-05** Passed Enrolled
- **2025-05-13** Approved by the Governor - Chapter 445 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/6ec87fcf-dde1-4964-88cc-9684c4216741`. Confidence: reported (aggregated from official Maryland legislature records).