---
type: "Bill"
title: "Coastal Wetlands Protection Act; revise definitions to include \"ordinary high water mark\"."
description: "Coastal Wetlands Protection Act; revise definitions to include \"ordinary high water mark\"."
jurisdiction: "us/states/ms"
legislature: "Mississippi Legislature"
session: "2021"
identifier: "HB 594"
citation: "Mississippi HB 594 (2021)"
classification: ["bill"]
subjects: ["Marine Resources", "Ports and Marine Resources"]
status: "enacted"
primary_sponsors: ["Ladner"]
version_count: 5
action_count: 19
vote_count: 4
first_action: "2021-01-18T06:00:00+00:00"
last_action: "2021-04-16T05:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/0fc6b163-b5ae-42e8-9790-fd54a2622d46"
source_url: "http://billstatus.ls.state.ms.us/2021/pdf/House_authors/Ladner.xml"
source_hash: "6b32a0efaeccdefaedb5cde156acdd191a9b49d416b1d2773ce2e866ac1e0320"
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-ms"]
---

# Mississippi HB 594 (2021) — Coastal Wetlands Protection Act; revise definitions to include "ordinary high water mark".

## Version chain

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

1. **As Introduced** (filed) — [source](http://billstatus.ls.state.ms.us/documents/2021/html/HB/0500-0599/HB0594IN.htm)
2. **Amendment Report for House Bill No. 594** (committee substitute) — [source](http://billstatus.ls.state.ms.us/documents/2021/pdf/sam/Amendment_Report_for_HB0594.pdf)
3. **As Passed the lower** (committee substitute) — [source](http://billstatus.ls.state.ms.us/documents/2021/html/HB/0500-0599/HB0594PS.htm)
4. **Committee Amendment No 1 (Adopted) (Voice Vote)** (committee substitute) — [source](http://billstatus.ls.state.ms.us/documents/2021/pdf/sam/HB0594_S_Cmte_Amend_01.pdf)
5. **Current version** (committee substitute) — [source](http://billstatus.ls.state.ms.us/documents/2021/html/HB/0500-0599/HB0594SG.htm)

## Votes

- Passage — **119–0** (pass) · lower
- Passage as Amended — **50–1** (pass) · upper
- Adopt Conference Report — **51–0** (pass) · upper
- Adopt Conference Report — **121–0** (pass) · lower

## Sponsors

- Ladner — primary (person)

## Timeline

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

- **2021-01-18T06:00:00+00:00** Referred To Marine Resources `referral-committee`
- **2021-01-27T06:00:00+00:00** Title Suff Do Pass `committee-passage`
- **2021-02-04T06:00:00+00:00** Passed `passage`
- **2021-02-05T06:00:00+00:00** Transmitted To Senate `introduction`
- **2021-02-26T06:00:00+00:00** Referred To Ports and Marine Resources `referral-committee`
- **2021-03-02T06:00:00+00:00** Title Suff Do Pass As Amended `committee-passage`
- **2021-03-09T06:00:00+00:00** Amended `amendment-passage`
- **2021-03-09T06:00:00+00:00** Passed As Amended `passage`
- **2021-03-10T06:00:00+00:00** Returned For Concurrence
- **2021-03-16T05:00:00+00:00** Decline to Concur/Invite Conf
- **2021-03-22T05:00:00+00:00** Conferees Named Ladner,Felsher,Eure
- **2021-03-23T05:00:00+00:00** Conferees Named Moran,Thompson,England
- **2021-03-27T05:00:00+00:00** Conference Report Filed
- **2021-03-27T05:00:00+00:00** Conference Report Filed
- **2021-03-28T05:00:00+00:00** Conference Report Adopted
- **2021-03-29T05:00:00+00:00** Conference Report Adopted
- **2021-04-01T05:00:00+00:00** Enrolled Bill Signed
- **2021-04-01T05:00:00+00:00** Enrolled Bill Signed
- **2021-04-16T05:00:00+00:00** Approved by Governor `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/0fc6b163-b5ae-42e8-9790-fd54a2622d46`. Confidence: reported (aggregated from official Mississippi legislature records).