---
type: "Bill"
title: "Define sex in Montana law"
description: "Define sex in Montana law"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2023"
identifier: "SB 458"
citation: "Montana SB 458 (2023)"
classification: ["bill"]
subjects: ["Corrections", "Discrimination and Human Rights", "Elections (see also: Ballot Issues)", "Estates and Trusts", "Family Law (see also: Minors)", "Health (see also: Health Care Services; Safety)", "Insurance", "Minors (see also: Family Law)", "Revenue", "State"]
status: "enacted"
primary_sponsors: ["Carl Glimm"]
version_count: 16
action_count: 59
vote_count: 10
first_action: "2023-01-07T19:09:28+00:00"
last_action: "2023-05-22T21:31:54+00:00"
source: "openstates"
source_identifier: "ocd-bill/ca4336d7-cfc2-4325-908d-2557cbb99472"
source_url: "https://bills.legmt.gov/#/bill/20231/LC4423"
source_hash: "46da76772226f299d81e86829128a588c8b9b43abd659b5da9e0ab836b9efe95"
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 458 (2023) — Define sex in Montana law

## Version chain

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

1. **SB0458.001.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19416)
2. **SB0458.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19417)
3. **SB0458.002.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19418)
4. **SB0458.002.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19414)
5. **SB0458.002.003.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19409)
6. **SB0458.002.003_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19419)
7. **SB0458.002.003_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19415)
8. **SB0458.003.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19412)
9. **SB0458.003.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19413)
10. **SB0458001SCS15238.slc.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19411)
11. **SB0458002CWS14970.slc.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19410)
12. **SB0458_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19425)
13. **SB0458_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19421)
14. **SB0458_3.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19424)
15. **SB0458_4.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19423)
16. **SB0458_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=19422)

## Votes

- (S) 3rd Reading Passed as Amended by House — **28–22** (pass) · upper
- (S) Committee Executive Action--Bill Passed as Amended — **6–3** (pass) · upper
- (S) 2nd Reading Passed as Amended — **28–22** (pass) · upper
- (H) 2nd Reading Concurred — **63–37** (pass) · lower
- (H) Committee Executive Action--Bill Concurred as Amended — **12–7** (pass) · lower
- (S) 3rd Reading Passed — **28–22** (pass) · upper
- (S) 2nd Reading Motion to Amend Carried — **30–20** (pass) · upper
- (S) 2nd Reading House Amendments Concurred — **31–19** (pass) · upper
- (H) 3rd Reading Concurred — **60–36** (pass) · lower
- (S) Committee Executive Action--Bill Passed — **11–8** (pass) · upper

## Sponsors

- Carl Glimm — primary (person)

## Timeline

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

- **2023-05-22T21:31:54+00:00** Chapter Number Assigned `became-law`
- **2023-05-19T18:59:00+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`
- **2023-05-02T16:31:54+00:00** (C) Printed - Enrolled Version Available `enrolled`
- **2023-05-02T16:31:53+00:00** (S) Returned from Enrolling
- **2023-04-28T00:28:05+00:00** (S) Sent to Enrolling
- **2023-04-27T19:46:00+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`
- **2023-04-26T19:25:00+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`
- **2023-04-24T19:58:34+00:00** (H) Returned to Senate with Amendments
- **2023-04-21T21:16:00+00:00** (H) 3rd Reading Concurred `passage, reading-3`
- **2023-04-21T19:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2023-04-20T21:03:00+00:00** (H) 2nd Reading Concurred `reading-2, reading-2`
- **2023-04-20T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2023-04-18T19:32:11+00:00** (C) Printed - New Version Available
- **2023-04-18T19:14:00+00:00** (H) Committee Report--Bill Concurred as Amended
- **2023-04-18T14:00:00+00:00** (H) Committee Executive Action--Bill Concurred as Amended
- **2023-04-13T14:00:00+00:00** (H) Hearing
- **2023-03-22T21:17:55+00:00** (H) First Reading `reading-1`
- **2023-03-22T18:14:22+00:00** (H) Referred to Committee `referral-committee`
- **2023-03-20T21:28:41+00:00** (S) Transmitted to House
- **2023-03-17T20:02:00+00:00** (S) 3rd Reading Passed `passage, reading-3`
- **2023-03-15T21:23:10+00:00** (C) Printed - New Version Available
- **2023-03-15T20:31:00+00:00** (S) 2nd Reading Passed as Amended `reading-2, reading-2`
- **2023-03-15T20:29:00+00:00** (S) 2nd Reading Motion to Amend Carried `reading-2`
- **2023-03-13T19:07:00+00:00** (S) Committee Report--Bill Passed `committee-passage`
- **2023-03-13T15:30:00+00:00** (S) Committee Executive Action--Bill Passed `committee-passage`
- **2023-03-10T16:00:00+00:00** (S) Hearing
- **2023-03-10T14:43:16+00:00** (S) Fiscal Note Printed
- **2023-03-10T00:07:12+00:00** (S) Fiscal Note Signed
- **2023-03-09T20:56:37+00:00** (S) Fiscal Note Received `receipt`
- **2023-03-03T03:27:00+00:00** (S) Rereferred to Committee `referral-committee, referral-committee`
- **2023-03-01T17:36:51+00:00** (C) Printed - New Version Available
- **2023-03-01T17:23:00+00:00** (S) Committee Report--Bill Passed as Amended `committee-passage`
- **2023-03-01T00:39:16+00:00** (S) Fiscal Note Requested
- **2023-02-27T22:00:00+00:00** (S) Committee Executive Action--Bill Passed as Amended `committee-passage`
- **2023-02-27T21:59:00+00:00** (S) Hearing
- **2023-02-27T18:05:04+00:00** (C) Amendments Available
- **2023-02-22T20:33:25+00:00** (S) First Reading `reading-1`
- **2023-02-22T19:01:42+00:00** (S) Referred to Committee `referral-committee`
- **2023-02-22T15:54:04+00:00** (C) Introduced Bill Text Available Electronically
- **2023-02-22T15:37:38+00:00** (S) Introduced
- **2023-02-22T15:11:14+00:00** (C) Draft Delivered to Requester
- **2023-02-21T21:44:56+00:00** (C) Draft Ready for Delivery
- **2023-02-21T20:05:56+00:00** (C) Executive Director Final Review
- **2023-02-21T20:05:51+00:00** (C) Draft Ready for Delivery
- **2023-02-21T19:40:47+00:00** (C) Draft in Assembly
- **2023-02-21T19:34:26+00:00** (C) Executive Director Review
- **2023-02-21T15:49:06+00:00** (C) Bill Draft Text Available Electronically
- **2023-02-21T15:49:05+00:00** (C) Draft in Final Drafter Review
- **2023-02-21T03:47:06+00:00** (C) Draft in Input/Proofing
- **2023-02-19T20:20:40+00:00** (C) Draft to Drafter - Edit Review
- **2023-02-15T20:25:17+00:00** (C) Draft in Edit
- **2023-02-15T20:17:25+00:00** (C) Draft in Legal Review
- **2023-02-15T15:32:44+00:00** (C) Draft to Requester for Review
- **2023-01-07T19:09:28+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/ca4336d7-cfc2-4325-908d-2557cbb99472`. Confidence: reported (aggregated from official Montana legislature records).