---
type: "Bill"
title: "Mandate disclosure of certain information in public health emergency"
description: "Mandate disclosure of certain information in public health emergency"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "HB 253"
citation: "Montana HB 253 (2025)"
classification: ["bill"]
subjects: ["Emergency Services", "Health", "State Government"]
status: "enacted"
primary_sponsors: ["Bill Mercer"]
version_count: 32
action_count: 37
vote_count: 6
first_action: "2024-12-14T17:23:40+00:00"
last_action: "2025-04-17T17:18:18+00:00"
source: "openstates"
source_identifier: "ocd-bill/1c44a7a2-8fa7-4eb3-af48-9de8bf189d2b"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC3438?open_tab=sum"
source_hash: "e841ed84c5ba807128d650d07766f3a79d9bf1e4454f1f490e76d9fa0d610f39"
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 253 (2025) — Mandate disclosure of certain information in public health emergency

## Version chain

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

1. **HB0253.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277215)
2. **HB0253.001.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=278931)
3. **HB0253_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272409)
4. **HB0253_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272737)
5. **HB0253_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=275364)
6. **HB0253_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=276413)
7. **HB0253_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279183)
8. **HB0253_1(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279184)
9. **HB0253_1(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279185)
10. **HB0253_1(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279186)
11. **HB0253_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272408)
12. **HB0253_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279188)
13. **HB0253_2(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302220)
14. **HB0253_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279189)
15. **HB0253_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279191)
16. **HB0253_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279201)
17. **HB0253_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279202)
18. **HB0253_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279203)
19. **HB0253_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279256)
20. **HB0253_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=283170)
21. **HB0253_2(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=295627)
22. **HB0253_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279187)
23. **HB0253_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=316413)
24. **HB0253_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=316414)
25. **HB0253_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=316415)
26. **HB0253_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317374)
27. **HB0253_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320836)
28. **HB0253_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324324)
29. **HB0253_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=326874)
30. **HB0253_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=327807)
31. **HB0253_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310668)
32. **LC3438.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=271672)

## Votes

- Do Pass — **92–7** (pass) · lower
- be_concurred_in — **11–0** (pass) · upper
- Do Pass — **91–8** (pass) · lower
- Do Concur — **50–0** (pass) · upper
- do_pass_as_amended — **15–6** (pass) · lower
- Do Concur — **48–0** (pass) · upper

## Sponsors

- Bill Mercer — primary (person)

## Timeline

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

- **2024-12-14T17:23:40+00:00** (LC) Drafter Assigned
- **2025-01-14T20:43:19+00:00** (LC) Draft in Legal Review
- **2025-01-14T22:21:06+00:00** (LC) Draft in Edit
- **2025-01-15T15:25:47+00:00** (LC) Draft in Input/Proofing
- **2025-01-15T19:14:23+00:00** (LC) Draft in Final Drafter Review
- **2025-01-16T19:06:32+00:00** (LC) Draft in Assembly
- **2025-01-16T21:19:04+00:00** (LC) Draft Ready for Delivery
- **2025-01-16T23:38:44+00:00** (LC) Draft Delivered to Requester
- **2025-01-17T20:39:22+00:00** (H) Introduced
- **2025-01-20T17:21:01+00:00** (H) Referred to Committee - (H) Human Services `referral-committee`
- **2025-01-20T20:18:36+00:00** (H) First Reading `reading-1`
- **2025-01-20T22:53:02+00:00** (H) Hearing - (H) Human Services
- **2025-02-04T23:25:21+00:00** (H) Committee Executive Action--Bill Passed as Amended - (H) Human Services `committee-passage`
- **2025-02-05T00:27:35+00:00** (H) Committee Executive Action--Bill Passed as Amended - (H) Human Services `committee-passage`
- **2025-02-05T20:14:00+00:00** (H) Committee Report--Bill Passed as Amended - (H) Human Services `committee-passage`
- **2025-02-10T20:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-02-10T21:17:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2025-02-11T20:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-02-11T21:40:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2025-02-11T22:17:00+00:00** (H) Transmitted to Senate
- **2025-02-12T20:18:23+00:00** (S) First Reading `reading-1`
- **2025-02-17T19:40:27+00:00** (S) Referred to Committee - (S) Public Health, Welfare and Safety `referral-committee`
- **2025-03-03T21:05:59+00:00** (S) Hearing - (S) Public Health, Welfare and Safety
- **2025-03-19T22:38:09+00:00** (S) Committee Executive Action--Bill Concurred - (S) Public Health, Welfare and Safety
- **2025-03-20T21:47:00+00:00** (S) Committee Report--Bill Concurred - (S) Public Health, Welfare and Safety
- **2025-03-27T23:01:56+00:00** (S) 2nd Reading Pass Consideration `reading-2`
- **2025-03-28T19:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-03-28T20:15:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2025-03-31T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-03-31T21:12:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2025-03-31T21:12:31+00:00** (H) Sent to Enrolling
- **2025-04-02T18:59:09+00:00** (H) Returned from Enrolling
- **2025-04-07T18:00:24+00:00** (H) Signed by Speaker `passage`
- **2025-04-09T17:30:28+00:00** (S) Signed by President `passage`
- **2025-04-09T19:50:28+00:00** (H) Transmitted to Governor `executive-receipt`
- **2025-04-16T13:17:00+00:00** (H) Signed by Governor `executive-signature`
- **2025-04-17T17:18:18+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/1c44a7a2-8fa7-4eb3-af48-9de8bf189d2b`. Confidence: reported (aggregated from official Montana legislature records).