---
type: "Bill"
title: "Revise definition of sex in Montana law"
description: "Revise definition of sex in Montana law"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "SB 437"
citation: "Montana SB 437 (2025)"
classification: ["bill"]
subjects: ["Corrections", "Discrimination", "Family Law", "Health", "Insurance"]
status: "enacted"
primary_sponsors: ["Carl Glimm"]
version_count: 88
action_count: 40
vote_count: 7
first_action: "2024-12-28T12:13:47+00:00"
last_action: "2026-03-25T17:54:37+00:00"
source: "openstates"
source_identifier: "ocd-bill/2d0b186d-edef-4795-9863-4a62bd98f65e"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC4192?open_tab=sum"
source_hash: "002f5a0fabadb8e2166cb34c42d7ace09f3d5ea76ae1635e506a5ac9ff61d11a"
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 437 (2025) — Revise definition of sex in Montana law

## Version chain

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

1. **LC4192.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284674)
2. **SB0045.003.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301014)
3. **SB0437.001.002_Amendments-in-Context_final-condensed(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=292240)
4. **SB0437.001.002_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=292237)
5. **SB0437.001.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=292232)
6. **SB0437.002.002_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=300984)
7. **SB0437.002.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=300983)
8. **SB0437.002.003_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301016)
9. **SB0437.002.003_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301013)
10. **SB0437.002.004_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=300986)
11. **SB0437.002.004_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=300985)
12. **SB0437.002.005_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=300988)
13. **SB0437.002.005_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=300987)
14. **SB0437_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=287171)
15. **SB0437_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=287923)
16. **SB0437_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293135)
17. **SB0437_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293136)
18. **SB0437_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293137)
19. **SB0437_1(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293138)
20. **SB0437_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=286532)
21. **SB0437_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293140)
22. **SB0437_2(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293193)
23. **SB0437_2(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293194)
24. **SB0437_2(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293195)
25. **SB0437_2(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293196)
26. **SB0437_2(14).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293197)
27. **SB0437_2(15).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293198)
28. **SB0437_2(16).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293200)
29. **SB0437_2(17).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293201)
30. **SB0437_2(18).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293202)
31. **SB0437_2(19).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293203)
32. **SB0437_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293142)
33. **SB0437_2(20).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293204)
34. **SB0437_2(21).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293205)
35. **SB0437_2(22).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293206)
36. **SB0437_2(23).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293207)
37. **SB0437_2(24).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293208)
38. **SB0437_2(25).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293209)
39. **SB0437_2(26).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293210)
40. **SB0437_2(27).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293211)
41. **SB0437_2(28).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293212)
42. **SB0437_2(29).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293213)
43. **SB0437_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293143)
44. **SB0437_2(30).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293215)
45. **SB0437_2(31).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293216)
46. **SB0437_2(32).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293218)
47. **SB0437_2(33).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293220)
48. **SB0437_2(34).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293221)
49. **SB0437_2(35).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293223)
50. **SB0437_2(36).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293224)
51. **SB0437_2(37).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293225)
52. **SB0437_2(38).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293228)
53. **SB0437_2(39).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293521)
54. **SB0437_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293165)
55. **SB0437_2(40).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293715)
56. **SB0437_2(41).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=307995)
57. **SB0437_2(42).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309270)
58. **SB0437_2(43).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309276)
59. **SB0437_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293166)
60. **SB0437_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293189)
61. **SB0437_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293190)
62. **SB0437_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293191)
63. **SB0437_2(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293192)
64. **SB0437_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293139)
65. **SB0437_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309300)
66. **SB0437_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309423)
67. **SB0437_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309424)
68. **SB0437_X(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309425)
69. **SB0437_X(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309426)
70. **SB0437_X(14).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309427)
71. **SB0437_X(15).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309428)
72. **SB0437_X(16).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309429)
73. **SB0437_X(17).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309430)
74. **SB0437_X(18).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309552)
75. **SB0437_X(19).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309553)
76. **SB0437_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309301)
77. **SB0437_X(20).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310978)
78. **SB0437_X(21).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=316915)
79. **SB0437_X(22).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320490)
80. **SB0437_X(23).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324253)
81. **SB0437_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309416)
82. **SB0437_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309417)
83. **SB0437_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309418)
84. **SB0437_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309419)
85. **SB0437_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309420)
86. **SB0437_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309421)
87. **SB0437_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309422)
88. **SB0437_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309278)

## Votes

- AMD-SB0437.001.002 Glimm D/PASS — **30–18** (pass) · upper
- Do Concur — **56–44** (pass) · lower
- be_concurred_in — **12–8** (pass) · lower
- Do Concur — **55–44** (pass) · lower
- Do Pass As Amended — **32–18** (pass) · upper
- do_pass — **5–3** (pass) · upper
- Do Pass — **31–18** (pass) · upper

## Sponsors

- Carl Glimm — primary (person)

## Timeline

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

- **2024-12-28T12:13:47+00:00** (LC) Drafter Assigned
- **2025-02-16T21:46:35+00:00** (LC) Draft in Legal Review
- **2025-02-17T01:21:02+00:00** (LC) Draft in Edit
- **2025-02-19T23:12:57+00:00** (LC) Draft in Input/Proofing
- **2025-02-22T22:43:36+00:00** (LC) Draft in Final Drafter Review
- **2025-02-23T00:57:20+00:00** (LC) Draft in Assembly
- **2025-02-23T18:59:50+00:00** (LC) Draft Ready for Delivery
- **2025-02-24T17:10:37+00:00** (LC) Draft Delivered to Requester
- **2025-02-24T19:00:28+00:00** (S) Introduced
- **2025-02-24T20:16:12+00:00** (S) First Reading `reading-1`
- **2025-02-25T01:16:44+00:00** (S) Fiscal Note Requested
- **2025-02-25T01:29:03+00:00** (S) Referred to Committee - (S) Judiciary `referral-committee`
- **2025-02-25T21:58:53+00:00** (S) Hearing - (S) Judiciary
- **2025-03-03T14:10:08+00:00** (S) Fiscal Note Received `receipt`
- **2025-03-03T14:10:17+00:00** (S) Fiscal Note Unsigned
- **2025-03-04T16:27:30+00:00** (S) Fiscal Note Printed
- **2025-03-04T23:00:00+00:00** (S) Committee Executive Action--Bill Passed - (S) Judiciary `committee-passage`
- **2025-03-04T23:25:00+00:00** (S) Committee Report--Bill Passed - (S) Judiciary `committee-passage`
- **2025-03-05T20:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-03-06T03:13:00+00:00** (S) 2nd Reading Motion to Amend Carried `reading-2`
- **2025-03-06T03:28:00+00:00** (S) 2nd Reading Passed as Amended `reading-2, reading-2`
- **2025-03-07T00:30:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-03-07T01:46:00+00:00** (S) 3rd Reading Passed `passage, reading-3`
- **2025-03-07T16:18:33+00:00** (S) Transmitted to House
- **2025-03-17T15:21:45+00:00** (H) Referred to Committee - (H) Judiciary `referral-committee`
- **2025-03-17T19:15:00+00:00** (H) First Reading `reading-1`
- **2025-03-24T23:57:10+00:00** (H) Hearing - (H) Judiciary
- **2025-04-09T18:36:45+00:00** (H) Committee Executive Action--Bill Concurred - (H) Judiciary
- **2025-04-09T22:22:00+00:00** (H) Committee Report--Bill Concurred - (H) Judiciary
- **2025-04-11T14:30:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-04-11T16:56:00+00:00** (H) 2nd Reading Concurred `reading-2, reading-2`
- **2025-04-11T21:01:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-04-11T23:57:00+00:00** (H) 3rd Reading Concurred `passage, reading-3`
- **2025-04-11T23:58:16+00:00** (S) Sent to Enrolling
- **2025-04-13T16:46:53+00:00** (S) Returned from Enrolling
- **2025-04-21T22:00:00+00:00** (S) Signed by President `passage`
- **2026-03-24T16:06:00+00:00** (H) Signed by Speaker `passage`
- **2026-03-24T18:40:00+00:00** (S) Transmitted to Governor `executive-receipt`
- **2026-03-24T22:26:00+00:00** (S) Signed by Governor `executive-signature`
- **2026-03-25T17:54:37+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/2d0b186d-edef-4795-9863-4a62bd98f65e`. Confidence: reported (aggregated from official Montana legislature records).