---
type: "Bill"
title: "Revise water discharge permitting"
description: "Revise water discharge permitting"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2023"
identifier: "HB 561"
citation: "Montana HB 561 (2023)"
classification: ["bill"]
subjects: ["Environmental Protection", "Rule Making"]
status: "enacted"
primary_sponsors: ["Marty Malone"]
version_count: 8
action_count: 51
vote_count: 10
first_action: "2022-12-03T20:36:04+00:00"
last_action: "2023-05-19T17:00:47+00:00"
source: "openstates"
source_identifier: "ocd-bill/56f7a95c-82f0-492f-ad47-b38240740ee7"
source_url: "https://bills.legmt.gov/#/bill/20231/LC2392"
source_hash: "446018f98e1317130527c6084c8802bbaf6813169d9d13773da4372e746c02d9"
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-mt"]
---

# Montana HB 561 (2023) — Revise water discharge permitting

## Version chain

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

1. **HB0561.001.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8915)
2. **HB0561.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8914)
3. **HB0561.002.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8917)
4. **HB0561.002.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8916)
5. **HB0561_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8921)
6. **HB0561_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8919)
7. **HB0561_3.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8920)
8. **HB0561_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8918)

## Votes

- (S) Tabled in Committee — **9–0** (pass) · upper
- (H) Committee Executive Action--Bill Passed as Amended — **12–3** (pass) · lower
- (H) 3rd Reading Passed as Amended by Senate — **95–4** (pass) · lower
- (S) 2nd Reading Concurred — **39–11** (pass) · upper
- (H) 2nd Reading Senate Amendments Concurred — **100–0** (pass) · lower
- (S) Taken from Table in Committee — **10–1** (pass) · upper
- (S) Committee Executive Action--Bill Concurred as Amended — **9–2** (pass) · upper
- (H) 3rd Reading Passed — **79–20** (pass) · lower
- (H) 2nd Reading Passed — **75–25** (pass) · lower
- (S) 3rd Reading Concurred — **46–4** (pass) · upper

## Sponsors

- Marty Malone — primary (person)

## Timeline

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

- **2023-05-19T17:00:47+00:00** Chapter Number Assigned `became-law`
- **2023-05-18T23:03:34+00:00** (H) Signed by Governor `executive-signature`
- **2023-05-08T16:20:00+00:00** (H) Transmitted to Governor `executive-receipt`
- **2023-05-04T23:00:00+00:00** (S) Signed by President `passage`
- **2023-05-04T20:00:00+00:00** (H) Signed by Speaker `passage`
- **2023-05-02T21:09:38+00:00** (C) Printed - Enrolled Version Available `enrolled`
- **2023-05-02T21:09:37+00:00** (H) Returned from Enrolling
- **2023-04-28T22:01:08+00:00** (H) Sent to Enrolling
- **2023-04-28T19:59:00+00:00** (H) 3rd Reading Passed as Amended by Senate `passage, passage, reading-3, reading-3`
- **2023-04-28T19:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2023-04-27T16:27:00+00:00** (H) 2nd Reading Senate Amendments Concurred `amendment-amendment, amendment-passage, reading-2, reading-2`
- **2023-04-27T16:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2023-04-19T02:13:00+00:00** (S) Returned to House with Amendments
- **2023-04-18T22:07:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2023-04-18T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2023-04-17T23:58:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2023-04-17T22:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-04-14T19:55:00+00:00** (S) Committee Report--Bill Concurred as Amended
- **2023-04-14T18:49:45+00:00** (C) Printed - New Version Available
- **2023-04-12T21:00:01+00:00** (S) Committee Executive Action--Bill Concurred as Amended
- **2023-04-12T21:00:00+00:00** (S) Taken from Table in Committee
- **2023-04-05T21:00:00+00:00** (S) Tabled in Committee `amendment-deferral`
- **2023-03-24T21:00:00+00:00** (S) Hearing
- **2023-03-14T14:18:33+00:00** (S) Referred to Committee `referral-committee`
- **2023-03-10T00:13:49+00:00** (S) First Reading `reading-1`
- **2023-03-03T17:19:26+00:00** (H) Transmitted to Senate
- **2023-03-03T04:15:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2023-03-01T16:41:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2023-02-23T22:22:54+00:00** (C) Printed - New Version Available
- **2023-02-23T20:20:00+00:00** (H) Committee Report--Bill Passed as Amended `committee-passage`
- **2023-02-22T22:00:00+00:00** (H) Committee Executive Action--Bill Passed as Amended `committee-passage`
- **2023-02-22T19:14:36+00:00** (C) Amendments Available
- **2023-02-20T22:00:45+00:00** (H) Hearing
- **2023-02-16T20:31:51+00:00** (H) First Reading `reading-1`
- **2023-02-16T18:29:00+00:00** (H) Referred to Committee `referral-committee`
- **2023-02-15T16:57:22+00:00** (C) Introduced Bill Text Available Electronically
- **2023-02-15T16:25:20+00:00** (H) Introduced
- **2023-02-15T15:18:08+00:00** (C) Draft Delivered to Requester
- **2023-02-15T00:09:58+00:00** (C) Draft Ready for Delivery
- **2023-02-14T20:14:11+00:00** (C) Executive Director Final Review
- **2023-02-14T20:14:04+00:00** (C) Draft Ready for Delivery
- **2023-02-14T18:07:45+00:00** (C) Draft in Assembly
- **2023-02-14T17:11:02+00:00** (C) Executive Director Review
- **2023-02-14T16:07:37+00:00** (C) Bill Draft Text Available Electronically
- **2023-02-14T16:07:36+00:00** (C) Draft in Final Drafter Review
- **2023-02-13T18:09:54+00:00** (C) Draft in Input/Proofing
- **2023-02-12T21:08:07+00:00** (C) Draft to Drafter - Edit Review
- **2023-02-10T00:19:01+00:00** (C) Draft in Edit
- **2023-02-07T22:15:37+00:00** (C) Draft in Legal Review
- **2023-02-03T01:01:38+00:00** (C) Draft to Requester for Review
- **2022-12-03T20:36:04+00:00** (C) Draft Request Received `receipt`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/56f7a95c-82f0-492f-ad47-b38240740ee7`. Confidence: reported (aggregated from official Montana legislature records).