---
type: "Bill"
title: "Generally revise civil liability laws"
description: "Generally revise civil liability laws"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "HB 521"
citation: "Montana HB 521 (2025)"
classification: ["bill"]
subjects: ["Civil Procedure", "Courts", "Liability"]
status: "enacted"
primary_sponsors: ["Curtis Schomer"]
version_count: 37
action_count: 36
vote_count: 7
first_action: "2024-12-16T12:40:15+00:00"
last_action: "2025-05-05T16:43:41+00:00"
source: "openstates"
source_identifier: "ocd-bill/12d1edf7-248f-4f62-811a-61bef5d1c647"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC4155?open_tab=sum"
source_hash: "10b3fa798c81bd850a15486d6f04db7699337a7a31996fdd7dcdba8c0f78c7ec"
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 521 (2025) — Generally revise civil liability laws

## Version chain

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

1. **HB0521.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=287998)
2. **HB0521.001.001_Amendments-in-Context_final-not condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=287999)
3. **HB0521_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=283711)
4. **HB0521_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=283722)
5. **HB0521_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291900)
6. **HB0521_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291901)
7. **HB0521_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291902)
8. **HB0521_1(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291903)
9. **HB0521_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=283180)
10. **HB0521_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291905)
11. **HB0521_2(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303297)
12. **HB0521_2(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310033)
13. **HB0521_2(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310035)
14. **HB0521_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291906)
15. **HB0521_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291968)
16. **HB0521_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291969)
17. **HB0521_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291970)
18. **HB0521_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=292001)
19. **HB0521_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293827)
20. **HB0521_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293970)
21. **HB0521_2(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=300190)
22. **HB0521_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291904)
23. **HB0521_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310037)
24. **HB0521_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321571)
25. **HB0521_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321572)
26. **HB0521_X(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321573)
27. **HB0521_X(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324686)
28. **HB0521_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310038)
29. **HB0521_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310302)
30. **HB0521_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310303)
31. **HB0521_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310314)
32. **HB0521_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310315)
33. **HB0521_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=311079)
34. **HB0521_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=316972)
35. **HB0521_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320544)
36. **HB0521_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310036)
37. **LC4155.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=281775)

## Votes

- Do Concur — **34–14** (pass) · upper
- Do Pass — **58–41** (pass) · lower
- to_table — **20–0** (pass) · lower
- be_concurred_in — **5–3** (pass) · upper
- Do Pass — **55–44** (pass) · lower
- do_pass_as_amended — **12–8** (pass) · lower
- Do Concur — **36–13** (pass) · upper

## Sponsors

- Curtis Schomer — primary (person)

## Timeline

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

- **2024-12-16T12:40:15+00:00** (LC) Drafter Assigned
- **2025-02-10T23:44:14+00:00** (LC) Draft in Legal Review
- **2025-02-11T01:15:13+00:00** (LC) Draft in Edit
- **2025-02-12T23:27:11+00:00** (LC) Draft in Input/Proofing
- **2025-02-13T13:54:04+00:00** (LC) Draft in Final Drafter Review
- **2025-02-13T19:32:00+00:00** (LC) Draft in Assembly
- **2025-02-17T14:04:42+00:00** (LC) Draft Ready for Delivery
- **2025-02-17T18:59:51+00:00** (LC) Draft Delivered to Requester
- **2025-02-17T19:52:54+00:00** (H) Introduced
- **2025-02-18T18:16:59+00:00** (H) Referred to Committee - (H) Judiciary `referral-committee`
- **2025-02-18T19:39:53+00:00** (H) First Reading `reading-1`
- **2025-02-18T23:10:17+00:00** (H) Hearing - (H) Judiciary
- **2025-02-24T18:53:18+00:00** (H) Tabled in Committee - (H) Judiciary `amendment-deferral`
- **2025-03-03T20:00:19+00:00** (H) Committee Executive Action--Bill Passed as Amended - (H) Judiciary `committee-passage`
- **2025-03-04T01:43:00+00:00** (H) Committee Report--Bill Passed as Amended - (H) Judiciary `committee-passage`
- **2025-03-05T15:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-03-05T16:47:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2025-03-07T15:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-03-07T16:27:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2025-03-07T18:00:00+00:00** (H) Transmitted to Senate
- **2025-03-14T23:06:17+00:00** (S) First Reading `reading-1`
- **2025-03-14T23:23:00+00:00** (S) Referred to Committee - (S) Judiciary `referral-committee`
- **2025-03-18T15:17:14+00:00** (S) Hearing - (S) Judiciary
- **2025-03-28T13:25:46+00:00** (S) Committee Executive Action--Bill Concurred - (S) Judiciary
- **2025-03-28T21:33:00+00:00** (S) Committee Report--Bill Concurred - (S) Judiciary
- **2025-04-12T15:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-04-12T19:26:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2025-04-14T16:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-04-14T18:01:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2025-04-14T18:01:49+00:00** (H) Sent to Enrolling
- **2025-04-15T14:34:54+00:00** (H) Returned from Enrolling
- **2025-04-23T22:30:32+00:00** (H) Signed by Speaker `passage`
- **2025-04-24T17:45:00+00:00** (S) Signed by President `passage`
- **2025-04-24T21:45:28+00:00** (H) Transmitted to Governor `executive-receipt`
- **2025-05-01T21:14:29+00:00** (H) Signed by Governor `executive-signature`
- **2025-05-05T16:43:41+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/12d1edf7-248f-4f62-811a-61bef5d1c647`. Confidence: reported (aggregated from official Montana legislature records).