---
type: "Bill"
title: "Clean Cars Act of 2021"
description: "Clean Cars Act of 2021"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2021"
identifier: "HB 44"
citation: "Maryland HB 44 (2021)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Fraser-Hidalgo"]
version_count: 4
action_count: 18
vote_count: 3
first_action: "2020-11-01"
last_action: "2021-05-30"
source: "openstates"
source_identifier: "ocd-bill/7d6c0855-2c8f-404a-9735-87bbfe294873"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/hb0044?ys=2021RS&search=True"
source_hash: "97daac57c2fdb0fd9a3038a7d56442390e303d1bad2a2135ee81b177c4683fd3"
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 44 (2021) — Clean Cars Act of 2021

## Version chain

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

1. **Chapter - Clean Cars Act of 2021** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/Chapters_noln/CH_670_hb0044e.pdf)
2. **Enrolled - Clean Cars Act of 2021** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/bills/hb/hb0044e.pdf)
3. **First - Clean Cars Act of 2021** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/bills/hb/hb0044f.pdf)
4. **Third - Clean Cars Act of 2021** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/bills/hb/hb0044t.pdf)

## Votes

- On Third Reading and Final Passage (Hse concurred) — **100–39** (pass) · lower
- On Third Reading — **106–29** (pass) · lower
- On Third Reading (Amend) — **35–10** (pass) · upper

## Sponsors

- Fraser-Hidalgo — primary (person)

## Timeline

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

- **2020-11-01** Pre-filed `introduction`
- **2021-01-13** First Reading Environment and Transportation `referral-committee`
- **2020-12-22** Hearing 1/28 at 1:30 p.m.
- **2021-03-20** Favorable with Amendments Report by Environment and Transportation `committee-passage-favorable`
- **2021-03-20** Favorable with Amendments { `committee-passage-favorable`
- **2021-03-20** Second Reading Passed with Amendments
- **2021-03-22** Third Reading Passed `passage`
- **2021-03-22** Referred Budget and Taxation `referral-committee`
- **2021-03-22** Reassigned to Finance Budget and Taxation
- **2021-03-23** Hearing 3/30 at 1:00 p.m. (Finance)
- **2021-04-09** Favorable with Amendments Report by Finance `committee-passage-favorable`
- **2021-04-09** Favorable with Amendments { `committee-passage-favorable`
- **2021-04-09** Second Reading Passed with Amendments
- **2021-04-10** Third Reading Passed `passage`
- **2021-04-12** House Concurs Senate Amendments
- **2021-04-12** Third Reading Passed `passage`
- **2021-04-12** Passed Enrolled
- **2021-05-30** Enacted under Article II, Section 17(c) of the Maryland Constitution - Chapter 670 `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/7d6c0855-2c8f-404a-9735-87bbfe294873`. Confidence: reported (aggregated from official Maryland legislature records).