---
type: "Bill"
title: "Vehicle Laws - Causing Diesel Emissions to Discharge Onto Another - Prohibition"
description: "Vehicle Laws - Causing Diesel Emissions to Discharge Onto Another - Prohibition"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2017"
identifier: "HB 11"
citation: "Maryland HB 11 (2017)"
classification: ["bill"]
subjects: ["Vehicle Laws - Rules of the Road", "Motor Vehicles", "Motor Vehicle Operation", "Pollution"]
status: "enacted"
primary_sponsors: ["Lam"]
version_count: 1
action_count: 17
vote_count: 2
first_action: "2016-08-23"
last_action: "2017-05-25"
source: "openstates"
source_identifier: "ocd-bill/58e47e20-c38d-48fb-859b-a0ad85a7d812"
source_url: "http://mgaleg.maryland.gov/webmga/frmMain.aspx?id=HB11&stab=01&pid=billpage&tab=subject3&ys=2017rs"
source_hash: "430e532e0474f60052084774f69ce36b812e633990d35ee6b774a77e592eb52c"
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 11 (2017) — Vehicle Laws - Causing Diesel Emissions to Discharge Onto Another - Prohibition

## 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/hb/hb0011f.pdf)

## Votes

- Third Reading — **94–30** (pass) · legislature
- Third Reading — **35–11** (pass) · legislature

## Sponsors

- Lam — primary (person)
- Barve — cosponsor (person)
- Ciliberti — cosponsor (person)
- Ebersole — cosponsor (person)
- Fraser-Hidalgo — cosponsor (person)
- Hill — cosponsor (person)
- Lafferty — cosponsor (person)
- Pendergrass — cosponsor (person)
- Robinson — cosponsor (person)
- Tarlau — cosponsor (person)

## Timeline

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

- **2016-08-23** Pre-filed `introduction`
- **2017-01-11** First Reading Environment and Transportation `referral-committee`
- **2017-01-11** Hearing 1/26 at 2:00 p.m.
- **2017-02-13** Favorable Report by Environment and Transportation `committee-passage-favorable`
- **2017-02-14** Favorable Report Adopted `committee-passage-favorable`
- **2017-02-14** Second Reading Passed
- **2017-02-16** Third Reading Passed (94-30) `passage`
- **2017-02-17** First Reading Judicial Proceedings `referral-committee`
- **2017-02-22** Hearing 3/16 at 1:00 p.m.
- **2017-03-01** Hearing canceled
- **2017-03-01** Hearing 3/21 at 1:00 p.m.
- **2017-04-06** Favorable Report by Judicial Proceedings `committee-passage-favorable`
- **2017-04-07** Favorable Report Adopted `committee-passage-favorable`
- **2017-04-07** Second Reading Passed
- **2017-04-10** Third Reading Passed (35-11) `passage`
- **2017-04-10** Returned Passed
- **2017-05-25** Approved by the Governor - Chapter 697 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/58e47e20-c38d-48fb-859b-a0ad85a7d812`. Confidence: reported (aggregated from official Maryland legislature records).