---
type: "Bill"
title: "Maryland–National Capital Park and Planning Commission – Mandatory Referral Review MC/PG 101–21"
description: "Maryland–National Capital Park and Planning Commission – Mandatory Referral Review MC/PG 101–21"
jurisdiction: "us/states/md"
legislature: "Maryland General Assembly"
session: "2021"
identifier: "HB 464"
citation: "Maryland HB 464 (2021)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Montgomery County Delegation and Prince George's County Delegation"]
version_count: 3
action_count: 16
vote_count: 1
first_action: "2021-01-15"
last_action: "2021-12-07"
source: "openstates"
source_identifier: "ocd-bill/608fb9a9-c2e6-4519-a3b7-ebbb9c987d86"
source_url: "http://mgaleg.maryland.gov/mgawebsite/Legislation/Details/hb0464?ys=2021RS&search=True"
source_hash: "f72621f5cc946ec0a2e2155df79fc4f83b5ce7b37a918dc45560e1e0896a15f6"
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 464 (2021) — Maryland–National Capital Park and Planning Commission – Mandatory Referral Review MC/PG 101–21

## Version chain

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

1. **Chapter - Maryland–National Capital Park and Planning Commission – Mandatory Referral Review MC/PG 101–21** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/Chapters_noln/Ch_6_hb0464t.pdf)
2. **First - Maryland–National Capital Park and Planning Commission – Mandatory Referral Review MC/PG 101–21** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/bills/hb/hb0464f.pdf)
3. **Third - Maryland–National Capital Park and Planning Commission – Mandatory Referral Review MC/PG 101–21** (committee substitute) — [source](http://mgaleg.maryland.gov/2021RS/bills/hb/hb0464t.pdf)

## Votes

- On Third Reading — **133–2** (pass) · lower

## Sponsors

- Montgomery County Delegation and Prince George's County Delegation — primary (person)

## Timeline

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

- **2021-01-15** First Reading Environment and Transportation `referral-committee`
- **2021-02-10** Hearing 3/02 at 1:30 p.m.
- **2021-03-18** Favorable Report by Environment and Transportation `committee-passage-favorable`
- **2021-03-18** Favorable Adopted Second Reading Passed `committee-passage-favorable`
- **2021-03-22** Third Reading Passed `passage`
- **2021-03-22** Referred Education, Health, and Environmental Affairs `referral-committee`
- **2021-03-24** Hearing 4/06 at 1:00 p.m.
- **2021-04-10** Favorable Report by Education, Health, and Environmental Affairs `committee-passage-favorable`
- **2021-04-10** Favorable Adopted Second Reading Passed `committee-passage-favorable`
- **2021-04-12** Third Reading Passed `passage`
- **2021-04-12** Returned Passed
- **2021-05-28** Vetoed by the Governor (Policy) `executive-veto`
- **2021-12-06** Motion Special Order vote on veto until next session (Delegate Luedtke) Adopted
- **2021-12-06** Overridden `veto-override-passage`
- **2021-12-07** Overridden `veto-override-passage`
- **2021-12-07** Became law per Maryland Constitution, Chapter 6 of 2021 Special Session `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/608fb9a9-c2e6-4519-a3b7-ebbb9c987d86`. Confidence: reported (aggregated from official Maryland legislature records).