---
type: "Bill"
title: "Potomac River Compact - Clarification of the Effectiveness of Amendments"
description: "Potomac River Compact - Clarification of the Effectiveness of Amendments"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2022"
identifier: "SB 466"
citation: "Maryland SB 466 (2022)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Carter"]
version_count: 3
action_count: 12
vote_count: 2
first_action: "2022-01-27"
last_action: "2022-05-16"
source: "openstates"
source_identifier: "ocd-bill/784429c5-d879-41f7-95f4-53ce65615f7e"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/sb0466?ys=2022RS&search=True"
source_hash: "ad1ea8e527942975039b563a8a84ffd57f45f438b71e66cdbd33e4a420495696"
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 466 (2022) — Potomac River Compact - Clarification of the Effectiveness of Amendments

## Version chain

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

1. **Chapter - Potomac River Compact - Clarification of the Effectiveness of Amendments** (committee substitute) — [source](http://mgaleg.maryland.gov/2022RS/Chapters_noln/CH_471_sb0466t.pdf)
2. **First - Potomac River Compact - Clarification of the Effectiveness of Amendments** (committee substitute) — [source](http://mgaleg.maryland.gov/2022RS/bills/sb/sb0466f.pdf)
3. **Third - Potomac River Compact - Clarification of the Effectiveness of Amendments** (committee substitute) — [source](http://mgaleg.maryland.gov/2022RS/bills/sb/sb0466t.pdf)

## Votes

- On Third Reading — **46–0** (pass) · upper
- On Third Reading — **134–1** (pass) · lower

## Sponsors

- Carter — primary (person)

## Timeline

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

- **2022-01-27** First Reading Education, Health, and Environmental Affairs `referral-committee`
- **2022-02-10** Hearing 3/01 at 1:00 p.m.
- **2022-03-14** Favorable Report by Education, Health, and Environmental Affairs `committee-passage-favorable`
- **2022-03-15** Favorable Adopted `committee-passage-favorable`
- **2022-03-15** Second Reading Passed
- **2022-03-17** Third Reading Passed `passage`
- **2022-03-18** Referred Environment and Transportation `referral-committee`
- **2022-04-07** Favorable Report by Environment and Transportation `committee-passage-favorable`
- **2022-04-07** Favorable Adopted Second Reading Passed `committee-passage-favorable`
- **2022-04-08** Third Reading Passed `passage`
- **2022-04-08** Returned Passed
- **2022-05-16** Approved by the Governor - Chapter 471 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/784429c5-d879-41f7-95f4-53ce65615f7e`. Confidence: reported (aggregated from official Maryland legislature records).