---
type: "Bill"
title: "Revise water laws concerning exceptions to change in appropriation right process"
description: "Revise water laws concerning exceptions to change in appropriation right process"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "HB 432"
citation: "Montana HB 432 (2025)"
classification: ["bill"]
subjects: ["Rule Making", "Water"]
status: "enacted"
primary_sponsors: ["Julie Darling"]
version_count: 49
action_count: 44
vote_count: 8
first_action: "2024-11-16T19:07:31+00:00"
last_action: "2025-05-19T21:52:43+00:00"
source: "openstates"
source_identifier: "ocd-bill/06160566-732f-4030-b8c4-121bc83b919e"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC1458?open_tab=sum"
source_hash: "fecd14bb772ebae2e8186d77b98ea76f1d98b0efcd1423ef71b0d03f51a4c3a5"
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 432 (2025) — Revise water laws concerning exceptions to change in appropriation right process

## Version chain

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

1. **HB0432.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=288153)
2. **HB0432.001.002_Amendments-in-Context_final-full(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=294625)
3. **HB0432.001.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=288155)
4. **HB0432.001.003_Amendments-in-Context_final-full(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=294626)
5. **HB0432.001.003_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=288154)
6. **HB0432.002.002_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291501)
7. **HB0432.002.002_Amendments-in-Context_final-full(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=294620)
8. **HB0432.002.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291500)
9. **HB0432.002.004_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305741)
10. **HB0432.002.004_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305740)
11. **HB0432.002.005_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305848)
12. **HB0432.002.005_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305889)
13. **HB0432_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=280548)
14. **HB0432_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289154)
15. **HB0432_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289155)
16. **HB0432_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289156)
17. **HB0432_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289157)
18. **HB0432_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=280236)
19. **HB0432_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289159)
20. **HB0432_2(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=318715)
21. **HB0432_2(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=318718)
22. **HB0432_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289161)
23. **HB0432_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289162)
24. **HB0432_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289163)
25. **HB0432_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289178)
26. **HB0432_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289179)
27. **HB0432_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289229)
28. **HB0432_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=292270)
29. **HB0432_2(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=315246)
30. **HB0432_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=289158)
31. **HB0432_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=318721)
32. **HB0432_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=319028)
33. **HB0432_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321010)
34. **HB0432_X(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323261)
35. **HB0432_X(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323262)
36. **HB0432_X(14).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323263)
37. **HB0432_X(15).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=325065)
38. **HB0432_X(16).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=326202)
39. **HB0432_X(17).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=327527)
40. **HB0432_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=318722)
41. **HB0432_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=319008)
42. **HB0432_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=319009)
43. **HB0432_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=319010)
44. **HB0432_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=319011)
45. **HB0432_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=319020)
46. **HB0432_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=319021)
47. **HB0432_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=319027)
48. **HB0432_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=318719)
49. **LC1458.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279061)

## Votes

- AMD-HB0432.002.002 Darling DO PASS — **34–65** (fail) · lower
- be_concurred_in — **8–3** (pass) · upper
- Do Pass — **93–6** (pass) · lower
- Do Pass — **95–4** (pass) · lower
- do_pass_as_amended — **11–3** (pass) · lower
- to_table — **6–5** (pass) · upper
- Do Concur — **45–3** (pass) · upper
- Do Concur — **45–4** (pass) · upper

## Sponsors

- Julie Darling — primary (person)

## Timeline

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

- **2024-11-16T19:07:31+00:00** (LC) Drafter Assigned
- **2024-12-02T19:36:37+00:00** (LC) Draft On Hold
- **2025-01-29T17:03:50+00:00** (LC) Draft Taken Off Hold
- **2025-01-30T19:02:38+00:00** (LC) Draft in Legal Review
- **2025-02-01T03:27:52+00:00** (LC) Drafter Assigned
- **2025-02-03T16:31:22+00:00** (LC) Draft in Legal Review
- **2025-02-03T16:51:29+00:00** (LC) Draft in Edit
- **2025-02-05T16:18:17+00:00** (LC) Draft in Input/Proofing
- **2025-02-05T19:35:55+00:00** (LC) Draft in Final Drafter Review
- **2025-02-05T22:33:59+00:00** (LC) Draft in Assembly
- **2025-02-06T14:32:09+00:00** (LC) Draft Ready for Delivery
- **2025-02-07T18:06:32+00:00** (LC) Draft Delivered to Requester
- **2025-02-07T21:56:31+00:00** (H) Introduced
- **2025-02-07T22:07:11+00:00** (H) Fiscal Note Requested
- **2025-02-10T17:12:51+00:00** (H) Referred to Committee - (H) Natural Resources `referral-committee`
- **2025-02-10T19:54:19+00:00** (H) First Reading `reading-1`
- **2025-02-13T17:50:25+00:00** (H) Fiscal Note Received `receipt`
- **2025-02-13T21:36:39+00:00** (H) Fiscal Note Signed
- **2025-02-13T23:16:31+00:00** (H) Fiscal Note Printed
- **2025-02-14T01:17:24+00:00** (H) Hearing - (H) Natural Resources
- **2025-02-27T03:20:49+00:00** (H) Committee Executive Action--Bill Passed as Amended - (H) Natural Resources `committee-passage`
- **2025-02-27T20:10:00+00:00** (H) Committee Report--Bill Passed as Amended - (H) Natural Resources `committee-passage`
- **2025-03-03T20:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-03-04T00:02:00+00:00** (H) 2nd Reading Motion to Amend Failed `amendment-failure, failure, reading-2`
- **2025-03-04T00:03:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2025-03-04T20:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-03-04T20:21:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2025-03-04T21:23:56+00:00** (H) Transmitted to Senate
- **2025-03-05T15:27:52+00:00** (S) Referred to Committee - (S) Natural Resources `referral-committee`
- **2025-04-01T00:47:01+00:00** (S) Hearing - (S) Natural Resources
- **2025-04-08T00:27:30+00:00** (S) Tabled in Committee - (S) Natural Resources `amendment-deferral`
- **2025-04-23T21:59:05+00:00** (S) Committee Executive Action--Bill Concurred - (S) Natural Resources
- **2025-04-24T19:16:00+00:00** (S) Committee Report--Bill Concurred - (S) Natural Resources
- **2025-04-25T15:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-04-25T15:25:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2025-04-28T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-04-28T21:38:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2025-04-28T21:38:48+00:00** (H) Sent to Enrolling
- **2025-04-29T22:07:46+00:00** (H) Returned from Enrolling
- **2025-05-02T19:00:46+00:00** (H) Signed by Speaker `passage`
- **2025-05-06T20:00:07+00:00** (S) Signed by President `passage`
- **2025-05-07T15:03:52+00:00** (H) Transmitted to Governor `executive-receipt`
- **2025-05-13T18:36:00+00:00** (H) Signed by Governor `executive-signature`
- **2025-05-19T21:52:43+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/06160566-732f-4030-b8c4-121bc83b919e`. Confidence: reported (aggregated from official Montana legislature records).