---
type: "Bill"
title: "Montgomery County - Community Choice Aggregation Pilot Program - Alterations MC 17-26"
description: "Montgomery County - Community Choice Aggregation Pilot Program - Alterations MC 17-26"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2026"
identifier: "HB 597"
citation: "Maryland HB 597 (2026)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Montgomery County Delegation"]
version_count: 3
action_count: 13
vote_count: 2
first_action: "2026-01-28"
last_action: "2026-04-28"
source: "openstates"
source_identifier: "ocd-bill/839a752a-bb20-44ad-8535-d364ac899b26"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/hb0597?ys=2026RS"
source_hash: "5b46a029a802b52410825374efde9c2d203612dad2bd35ce97b4aaa629d7ab17"
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 597 (2026) — Montgomery County - Community Choice Aggregation Pilot Program - Alterations MC 17-26

## Version chain

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

1. **Chapter - Montgomery County - Community Choice Aggregation Pilot Program - Alterations MC 17-26** (committee substitute) — [source](http://mgaleg.maryland.gov/2026RS/Chapters_noln/CH_347_hb0597t.pdf)
2. **First - Montgomery County - Community Choice Aggregation Pilot Program - Alterations MC 17-26** (committee substitute) — [source](http://mgaleg.maryland.gov/2026RS/bills/hb/hb0597f.pdf)
3. **Third - Montgomery County - Community Choice Aggregation Pilot Program - Alterations MC 17-26** (committee substitute) — [source](http://mgaleg.maryland.gov/2026RS/bills/hb/hb0597t.pdf)

## Votes

- On Third Reading — **131–0** (pass) · lower
- On Third Reading — **25–8** (pass) · upper

## Sponsors

- Montgomery County Delegation — primary (person)

## Timeline

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

- **2026-01-28** First Reading Environment and Transportation `referral-committee`
- **2026-02-05** Hearing 2/24 at 1:00 p.m.
- **2026-03-19** Favorable Report by Environment and Transportation `committee-passage-favorable`
- **2026-03-19** Favorable Adopted Second Reading Passed `committee-passage-favorable`
- **2026-03-19** Third Reading Passed `passage`
- **2026-03-20** Referred Education, Energy, and the Environment `referral-committee`
- **2026-03-24** Hearing 4/02 at 1:00 p.m.
- **2026-04-08** Favorable Report by Education, Energy, and the Environment `committee-passage-favorable`
- **2026-04-08** Favorable Adopted `committee-passage-favorable`
- **2026-04-08** Second Reading Passed
- **2026-04-09** Third Reading Passed `passage`
- **2026-04-10** Returned Passed
- **2026-04-28** Approved by the Governor - Chapter 347 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/839a752a-bb20-44ad-8535-d364ac899b26`. Confidence: reported (aggregated from official Maryland legislature records).