---
type: "Bill"
title: "Municipalities - Open Drainage Inlets - Inventory and Improvements (Mason's Law)"
description: "Municipalities - Open Drainage Inlets - Inventory and Improvements (Mason's Law)"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2026"
identifier: "SB 189"
citation: "Maryland SB 189 (2026)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Lewis Young"]
version_count: 4
action_count: 17
vote_count: 3
first_action: "2025-10-21"
last_action: "2026-05-12"
source: "openstates"
source_identifier: "ocd-bill/59034c21-9433-4db2-966b-67deb39d0604"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/sb0189?ys=2026RS"
source_hash: "2bca666f484648ca082b27fceaba9fd8f511c3d9cc1c17f697a5e7e89631ce90"
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 189 (2026) — Municipalities - Open Drainage Inlets - Inventory and Improvements (Mason's Law)

## Version chain

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

1. **Chapter - Municipalities - Open Drainage Inlets - Inventory and Improvements (Mason's Law)** (committee substitute) — [source](http://mgaleg.maryland.gov/2026RS/Chapters_noln/CH_356_sb0189e.pdf)
2. **Enrolled - Municipalities - Open Drainage Inlets - Inventory and Improvements (Mason's Law)** (committee substitute) — [source](http://mgaleg.maryland.gov/2026RS/bills/sb/sb0189e.pdf)
3. **First - Municipalities - Open Drainage Inlets - Required Grating Systems (Mason's Law)** (committee substitute) — [source](http://mgaleg.maryland.gov/2026RS/bills/sb/sb0189f.pdf)
4. **Third - Municipalities - Open Drainage Inlets - Required Grating Systems (Mason's Law)** (committee substitute) — [source](http://mgaleg.maryland.gov/2026RS/bills/sb/sb0189t.pdf)

## Votes

- Bill is on Third Reading for Final Passage. — **47–0** (pass) · upper
- On Third Reading (Amend) — **138–0** (pass) · lower
- On Third Reading — **45–0** (pass) · upper

## Sponsors

- Lewis Young — primary (person)

## Timeline

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

- **2025-10-21** Pre-filed `introduction`
- **2026-01-14** First Reading Education, Energy, and the Environment `referral-committee`
- **2026-01-16** Hearing 2/03 at 1:00 p.m.
- **2026-03-18** Favorable with Amendments Report by Education, Energy, and the Environment `committee-passage-favorable`
- **2026-03-18** Favorable with Amendments { `committee-passage-favorable`
- **2026-03-18** Second Reading Passed with Amendments
- **2026-03-19** Third Reading Passed `passage`
- **2026-03-20** Referred Environment and Transportation `referral-committee`
- **2026-03-25** Hearing 4/02 at 1:00 p.m.
- **2026-04-08** Favorable with Amendments Report by Environment and Transportation `committee-passage-favorable`
- **2026-04-09** Favorable with Amendments { `committee-passage-favorable`
- **2026-04-09** Second Reading Passed with Amendments
- **2026-04-13** Third Reading Passed `passage`
- **2026-04-13** Senate Concurs House Amendments
- **2026-04-13** Third Reading Passed `passage`
- **2026-04-13** Passed Enrolled
- **2026-05-12** Approved by the Governor - Chapter 356 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/59034c21-9433-4db2-966b-67deb39d0604`. Confidence: reported (aggregated from official Maryland legislature records).