---
type: "Bill"
title: "Maryland Department of Health – Biosafety Level 3 Laboratories in Frederick County"
description: "Maryland Department of Health – Biosafety Level 3 Laboratories in Frederick County"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2020"
identifier: "SB 450"
citation: "Maryland SB 450 (2020)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Hough", "Young"]
version_count: 3
action_count: 12
vote_count: 2
first_action: "2020-01-27"
last_action: "2020-05-08"
source: "openstates"
source_identifier: "ocd-bill/3bdf86a4-4d33-4665-95b4-45d02cfb43ab"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/sb0450?ys=2020RS&search=True"
source_hash: "0ef4fb98ac4d2f35bf6292af9c5bdadb4a97140234509c5bc983319e600a03a6"
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 450 (2020) — Maryland Department of Health – Biosafety Level 3 Laboratories in Frederick County

## Version chain

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

1. **Chapter - Maryland Department of Health – Biosafety Level 3 Laboratories in Frederick County** (committee substitute) — [source](http://mgaleg.maryland.gov/2020RS/Chapters_noln/CH_263_sb0450t.pdf)
2. **First - Maryland Department of Health - Biosafety Level 3 Laboratories** (committee substitute) — [source](http://mgaleg.maryland.gov/2020RS/bills/sb/sb0450f.pdf)
3. **Third - Maryland Department of Health – Biosafety Level 3 Laboratories in Frederick County** (committee substitute) — [source](http://mgaleg.maryland.gov/2020RS/bills/sb/sb0450t.pdf)

## Votes

- On Third Reading — **45–0** (pass) · upper
- On Third Reading — **132–1** (pass) · lower

## Sponsors

- Hough — primary (person)
- Young — primary (person)

## Timeline

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

- **2020-01-27** First Reading Finance `referral-committee`
- **2020-03-04** Hearing 3/11 at 1:00 p.m.
- **2020-03-13** Favorable with Amendments Report by Finance `committee-passage-favorable`
- **2020-03-13** Favorable with Amendments { `committee-passage-favorable`
- **2020-03-13** Second Reading Passed with Amendments
- **2020-03-14** Third Reading Passed `passage`
- **2020-03-15** Referred Health and Government Operations `referral-committee`
- **2020-03-17** Favorable Report by Health and Government Operations `committee-passage-favorable`
- **2020-03-17** Favorable Adopted Second Reading Passed `committee-passage-favorable`
- **2020-03-18** Third Reading Passed `passage`
- **2020-03-18** Returned Passed
- **2020-05-08** Enacted under Article II, Section 17(c) of the Maryland Constitution - Chapter 263 `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/3bdf86a4-4d33-4665-95b4-45d02cfb43ab`. Confidence: reported (aggregated from official Maryland legislature records).