---
type: "Bill"
title: "Revise MEPA relating to litigation"
description: "Revise MEPA relating to litigation"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2023"
identifier: "SB 557"
citation: "Montana SB 557 (2023)"
classification: ["bill"]
subjects: ["Courts (see also: Judges and Justices; Juries and Jurors)", "Environmental Protection", "Oil and Gas (see also: Mining and Minerals; Taxation--Oil and Gas)", "Revenue", "State"]
status: "enacted"
primary_sponsors: ["Mark Noland"]
version_count: 9
action_count: 57
vote_count: 9
first_action: "2022-11-29T18:32:01+00:00"
last_action: "2023-05-22T21:43:04+00:00"
source: "openstates"
source_identifier: "ocd-bill/85be0c52-f7a3-480d-94e3-9ac9269e1720"
source_url: "https://bills.legmt.gov/#/bill/20231/LC1535"
source_hash: "649f343b4f30fdc39bfcc38edea5bc9fa1bfd9cc0c67d3e47cd8ee116bed030f"
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 SB 557 (2023) — Revise MEPA relating to litigation

## Version chain

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

1. **SB0557.001.001.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=10423)
2. **SB0557.001.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8743)
3. **SB0557.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8744)
4. **SB0557.002.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8741)
5. **SB0557.002.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8742)
6. **SB0557_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8714)
7. **SB0557_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8715)
8. **SB0557_3.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8716)
9. **SB0557_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=8717)

## Votes

- (H) Committee Executive Action--Bill Concurred as Amended — **8–7** (pass) · lower
- (S) 2nd Reading Motion to Amend Carried — **49–0** (pass) · upper
- (H) 2nd Reading Concurred — **64–35** (pass) · lower
- (S) 2nd Reading House Amendments Concurred — **34–16** (pass) · upper
- (S) 2nd Reading Passed as Amended — **30–19** (pass) · upper
- (S) Committee Executive Action--Bill Passed — **6–4** (pass) · upper
- (H) 3rd Reading Concurred — **65–33** (pass) · lower
- (S) 3rd Reading Passed — **30–20** (pass) · upper
- (S) 3rd Reading Passed as Amended by House — **34–16** (pass) · upper

## Sponsors

- Mark Noland — primary (person)

## Timeline

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

- **2023-05-22T21:43:04+00:00** Chapter Number Assigned `became-law`
- **2023-05-19T19:18:00+00:00** (S) Signed by Governor `executive-signature`
- **2023-05-11T22:30:00+00:00** (S) Transmitted to Governor `executive-receipt`
- **2023-05-11T22:00:00+00:00** (H) Signed by Speaker `passage`
- **2023-05-04T17:00:00+00:00** (S) Signed by President `passage`
- **2023-05-02T16:36:00+00:00** (C) Printed - Enrolled Version Available `enrolled`
- **2023-05-02T16:35:59+00:00** (S) Returned from Enrolling
- **2023-04-28T00:28:27+00:00** (S) Sent to Enrolling
- **2023-04-27T19:49:00+00:00** (S) 3rd Reading Passed as Amended by House `passage, passage, reading-3, reading-3`
- **2023-04-27T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2023-04-26T19:27:00+00:00** (S) 2nd Reading House Amendments Concurred `amendment-amendment, amendment-passage, reading-2, reading-2`
- **2023-04-26T19:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-04-24T20:39:34+00:00** (H) Returned to Senate with Amendments
- **2023-04-24T19:36:00+00:00** (H) 3rd Reading Concurred `passage, reading-3`
- **2023-04-24T19:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2023-04-21T20:43:00+00:00** (H) 2nd Reading Concurred `reading-2, reading-2`
- **2023-04-21T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2023-04-18T19:35:35+00:00** (C) Printed - New Version Available
- **2023-04-18T19:13:00+00:00** (H) Committee Report--Bill Concurred as Amended
- **2023-04-18T00:45:00+00:00** (H) Committee Executive Action--Bill Concurred as Amended
- **2023-04-14T21:00:00+00:00** (H) Hearing
- **2023-04-05T20:11:08+00:00** (H) First Reading `reading-1`
- **2023-04-05T19:27:19+00:00** (H) Referred to Committee `referral-committee`
- **2023-04-04T22:28:41+00:00** (S) Transmitted to House
- **2023-04-04T20:42:00+00:00** (S) 3rd Reading Passed `passage, reading-3`
- **2023-04-03T18:25:16+00:00** (C) Printed - New Version Available
- **2023-04-03T16:59:00+00:00** (S) 2nd Reading Passed as Amended `reading-2, reading-2`
- **2023-04-03T16:58:00+00:00** (S) 2nd Reading Motion to Amend Carried `reading-2`
- **2023-03-30T21:20:00+00:00** (S) Committee Report--Bill Passed `committee-passage`
- **2023-03-30T21:19:00+00:00** (C) Amendments Available
- **2023-03-30T14:22:21+00:00** (S) Fiscal Note Printed
- **2023-03-30T14:22:15+00:00** (S) Fiscal Note Signed
- **2023-03-30T14:00:00+00:00** (S) Committee Executive Action--Bill Passed `committee-passage`
- **2023-03-29T14:22:08+00:00** (S) Fiscal Note Received `receipt`
- **2023-03-29T14:00:00+00:00** (S) Hearing
- **2023-03-28T19:29:00+00:00** (S) First Reading `reading-1`
- **2023-03-27T23:00:06+00:00** (S) Referred to Committee `referral-committee`
- **2023-03-27T22:47:36+00:00** (C) Introduced Bill Text Available Electronically
- **2023-03-27T22:44:01+00:00** (S) Fiscal Note Requested
- **2023-03-27T21:41:35+00:00** (S) Introduced
- **2023-03-27T21:41:34+00:00** (C) Fiscal Note Probable
- **2023-03-24T18:23:02+00:00** (C) Draft Ready for Delivery
- **2023-03-24T13:36:15+00:00** (C) Executive Director Final Review
- **2023-03-24T13:36:10+00:00** (C) Draft Ready for Delivery
- **2023-03-24T13:03:30+00:00** (C) Draft in Assembly
- **2023-03-23T23:08:17+00:00** (C) Executive Director Review
- **2023-03-23T21:57:13+00:00** (C) Bill Draft Text Available Electronically
- **2023-03-23T21:57:12+00:00** (C) Draft in Final Drafter Review
- **2023-03-23T18:22:51+00:00** (C) Draft in Input/Proofing
- **2023-03-23T18:21:50+00:00** (C) Draft to Drafter - Edit Review
- **2023-03-21T14:37:52+00:00** (C) Draft in Edit
- **2023-03-20T23:35:44+00:00** (C) Draft in Legal Review
- **2023-03-17T20:26:22+00:00** (C) Draft to Requester for Review
- **2023-03-15T20:38:59+00:00** (C) Draft to Requester for Review
- **2023-03-14T21:22:28+00:00** (C) Draft to Requester for Review
- **2023-01-23T23:50:42+00:00** (C) Draft On Hold
- **2022-11-29T18:32:01+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/85be0c52-f7a3-480d-94e3-9ac9269e1720`. Confidence: reported (aggregated from official Montana legislature records).