---
type: "Bill"
title: "Revise wind and solar facility decommissioning"
description: "Revise wind and solar facility decommissioning"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "HB 31"
citation: "Montana HB 31 (2025)"
classification: ["bill"]
subjects: ["Energy", "Environmental Protection"]
status: "enacted"
primary_sponsors: ["Neil Duram"]
version_count: 38
action_count: 40
vote_count: 10
first_action: "2024-10-09T20:09:46+00:00"
last_action: "2025-05-16T22:21:38+00:00"
source: "openstates"
source_identifier: "ocd-bill/88b7c2be-295c-41c8-946f-05d0585e9d0c"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC0546?open_tab=sum"
source_hash: "6fe004348381736a8028b98ab4c81e5edcc4fe6b9ef30e3a8ed70073f894dc3b"
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 31 (2025) — Revise wind and solar facility decommissioning

## Version chain

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

1. **HB0031.001.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284769)
2. **HB0031.001.004_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=306505)
3. **HB0031.002.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307671)
4. **HB0031.002.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307670)
5. **HB0031.002.002_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=308185)
6. **HB0031.002.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=308183)
7. **HB0031_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=269428)
8. **HB0031_1(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307255)
9. **HB0031_1(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307818)
10. **HB0031_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=273226)
11. **HB0031_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=273540)
12. **HB0031_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=275437)
13. **HB0031_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=276485)
14. **HB0031_1(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=283984)
15. **HB0031_1(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307252)
16. **HB0031_1(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307253)
17. **HB0031_1(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307254)
18. **HB0031_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=267225)
19. **HB0031_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307274)
20. **HB0031_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307809)
21. **HB0031_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307815)
22. **HB0031_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307816)
23. **HB0031_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=308970)
24. **HB0031_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314323)
25. **HB0031_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314324)
26. **HB0031_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307273)
27. **HB0031_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314329)
28. **HB0031_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=325815)
29. **HB0031_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314726)
30. **HB0031_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314727)
31. **HB0031_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317191)
32. **HB0031_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320741)
33. **HB0031_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323087)
34. **HB0031_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323088)
35. **HB0031_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323089)
36. **HB0031_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=325016)
37. **HB0031_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314325)
38. **LC0546.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=265418)

## Votes

- Do Concur — **99–0** (pass) · lower
- be_concurred_in_as_amended — **10–0** (pass) · upper
- Do Concur — **46–2** (pass) · upper
- Do Pass — **99–0** (pass) · lower
- be_concurred_in_as_amended — **13–0** (pass) · upper
- Do Pass — **99–0** (pass) · lower
- do_pass — **14–0** (pass) · lower
- Do Concur — **44–6** (pass) · upper
- Do Concur — **100–0** (pass) · lower
- AMD-HB0031.002.002 Phalen D/PASS — **14–36** (fail) · upper

## Sponsors

- Neil Duram — primary (person)

## Timeline

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

- **2024-10-09T20:09:46+00:00** (LC) Drafter Assigned
- **2024-10-28T15:28:11+00:00** (LC) Draft in Legal Review
- **2024-11-12T18:54:12+00:00** (LC) Draft in Edit
- **2024-11-14T15:10:58+00:00** (LC) Draft in Input/Proofing
- **2024-11-14T19:54:40+00:00** (LC) Draft in Final Drafter Review
- **2024-11-17T18:44:20+00:00** (LC) Draft in Assembly
- **2024-11-19T00:14:22+00:00** (LC) Draft Ready for Delivery
- **2024-12-06T22:52:40+00:00** (H) Introduced
- **2024-12-26T20:02:00+00:00** (H) Referred to Committee - (H) Natural Resources `referral-committee`
- **2025-01-06T17:29:00+00:00** (H) First Reading `reading-1`
- **2025-01-07T01:14:00+00:00** (H) Hearing - (H) Natural Resources
- **2025-01-16T00:35:22+00:00** (H) Committee Executive Action--Bill Passed - (H) Natural Resources `committee-passage`
- **2025-01-16T20:16:45+00:00** (H) Committee Report--Bill Passed - (H) Natural Resources `committee-passage`
- **2025-01-20T20:28:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2025-01-21T21:22:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2025-01-21T21:48:48+00:00** (H) Transmitted to Senate
- **2025-01-22T20:35:58+00:00** (S) First Reading `reading-1`
- **2025-02-04T17:47:30+00:00** (S) Referred to Committee - (S) Energy, Technology & Federal Relations `referral-committee`
- **2025-02-04T21:17:41+00:00** (S) Hearing - (S) Energy, Technology & Federal Relations
- **2025-02-19T00:08:17+00:00** (S) Committee Executive Action--Bill Concurred as Amended - (S) Energy, Technology & Federal Relations
- **2025-04-08T21:06:00+00:00** (S) Committee Executive Action--Bill Concurred as Amended - (S) Energy, Technology & Federal Relations
- **2025-04-08T21:06:12+00:00** (S) Committee Executive Action--Bill Concurred as Amended - (S) Energy, Technology & Federal Relations
- **2025-04-09T19:39:00+00:00** (S) Committee Report--Bill Concurred as Amended - (S) Energy, Technology & Federal Relations
- **2025-04-10T19:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-04-10T22:13:00+00:00** (S) 2nd Reading Motion to Amend Failed `amendment-failure, failure, reading-2`
- **2025-04-10T22:19:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2025-04-11T16:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-04-11T21:57:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2025-04-12T00:05:05+00:00** (S) Returned to House with Amendments
- **2025-04-16T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-04-16T19:53:00+00:00** (H) 2nd Reading Senate Amendments Concurred `amendment-amendment, amendment-passage, reading-2, reading-2`
- **2025-04-17T19:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-04-17T21:56:00+00:00** (H) 3rd Reading Passed as Amended by Senate `passage, passage, reading-3, reading-3`
- **2025-04-18T19:54:11+00:00** (H) Sent to Enrolling
- **2025-04-23T05:31:37+00:00** (H) Returned from Enrolling
- **2025-05-01T19:00:49+00:00** (H) Signed by Speaker `passage`
- **2025-05-02T16:00:24+00:00** (S) Signed by President `passage`
- **2025-05-05T16:05:54+00:00** (H) Transmitted to Governor `executive-receipt`
- **2025-05-12T17:08:00+00:00** (H) Signed by Governor `executive-signature`
- **2025-05-16T22:21:38+00:00** Chapter Number Assigned `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/88b7c2be-295c-41c8-946f-05d0585e9d0c`. Confidence: reported (aggregated from official Montana legislature records).