---
type: "Bill"
title: "Clean Cars Act of 2017"
description: "Clean Cars Act of 2017"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2017"
identifier: "SB 393"
citation: "Maryland SB 393 (2017)"
classification: ["bill"]
subjects: ["Taxes - Transportation", "Vehicle Laws - Licensing and Registration", "Environment", "Department of", "Excise Tax", "Motor Vehicles", "Motor Vehicle Equipment", "Pollution", "Reports", "Revenue and Taxes", "Rules and Regulations", "Tax Credits", "Transportation", "Department of"]
status: "enacted"
primary_sponsors: ["Manno"]
version_count: 1
action_count: 16
vote_count: 3
first_action: "2017-01-27"
last_action: "2017-05-04"
source: "openstates"
source_identifier: "ocd-bill/d3ce392c-e39f-46ac-8f8b-0a6ed2ac1d70"
source_url: "http://mgaleg.maryland.gov/webmga/frmMain.aspx?id=SB393&stab=01&pid=billpage&tab=subject3&ys=2017rs"
source_hash: "835da4009f51eaf309a8935c9a6a8cf9ac08722c461401fbd46110ff52ac33f2"
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 393 (2017) — Clean Cars Act of 2017

## Version chain

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

1. **Bill Text** (committee substitute) — [source](http://mgaleg.maryland.gov/2017RS/bills/sb/sb0393f.pdf)

## Votes

- Third Reading — **46–0** (pass) · legislature
- Third Reading — **47–0** (pass) · legislature
- Third Reading — **135–2** (pass) · legislature

## Sponsors

- Manno — primary (person)

## Timeline

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

- **2017-01-27** First Reading Budget and Taxation `referral-committee`
- **2017-02-01** Hearing 2/22 at 1:00 p.m.
- **2017-03-24** Favorable with Amendments Report by Budget and Taxation `committee-passage-favorable`
- **2017-03-24** Favorable with Amendments {489632/1 Report Adopted `committee-passage-favorable`
- **2017-03-24** Second Reading Passed with Amendments
- **2017-03-27** Third Reading Passed (46-0) `passage`
- **2017-03-27** First Reading House Rules and Executive Nominations `referral-committee`
- **2017-04-04** Rereferred to Environment and Transportation
- **2017-04-07** Favorable with Amendments Report by Environment and Transportation `committee-passage-favorable`
- **2017-04-07** Favorable with Amendments {170119/1 Report Adopted `committee-passage-favorable`
- **2017-04-07** Second Reading Passed with Amendments
- **2017-04-08** Third Reading Passed with Amendments (135-2) `passage`
- **2017-04-10** Senate Concur - House Amendments
- **2017-04-10** Third Reading Passed (47-0) `passage`
- **2017-04-10** Passed Enrolled
- **2017-05-04** Approved by the Governor - Chapter 363 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/d3ce392c-e39f-46ac-8f8b-0a6ed2ac1d70`. Confidence: reported (aggregated from official Maryland legislature records).