---
type: "Bill"
title: "Revising laws related to dental anesthesia inspections"
description: "Revising laws related to dental anesthesia inspections"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "HB 584"
citation: "Montana HB 584 (2025)"
classification: ["bill"]
subjects: ["Health Care Services", "Professions and Occupations A-D", "Revenue", "State", "Rule Making"]
status: "enacted"
primary_sponsors: ["Ed Buttrey"]
version_count: 29
action_count: 43
vote_count: 6
first_action: "2024-10-04T19:07:29+00:00"
last_action: "2025-05-19T22:25:23+00:00"
source: "openstates"
source_identifier: "ocd-bill/cd22f08d-3e44-4797-9d9f-6bcfeba0fe47"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC0452?open_tab=sum"
source_hash: "020265a479056ca6d9dad5bff99ba9438e811c11a2ee66594a966210a966a8d8"
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 584 (2025) — Revising laws related to dental anesthesia inspections

## Version chain

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

1. **HB0584.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=299850)
2. **HB0584.001.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=299949)
3. **HB0584_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284282)
4. **HB0584_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285032)
5. **HB0584_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302727)
6. **HB0584_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302728)
7. **HB0584_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302729)
8. **HB0584_1(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302730)
9. **HB0584_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284281)
10. **HB0584_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302733)
11. **HB0584_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302737)
12. **HB0584_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302742)
13. **HB0584_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302746)
14. **HB0584_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302751)
15. **HB0584_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305342)
16. **HB0584_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302731)
17. **HB0584_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=315141)
18. **HB0584_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=325820)
19. **HB0584_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=327343)
20. **HB0584_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317241)
21. **HB0584_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317808)
22. **HB0584_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317809)
23. **HB0584_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320895)
24. **HB0584_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323299)
25. **HB0584_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323300)
26. **HB0584_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=323301)
27. **HB0584_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=325078)
28. **HB0584_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=315139)
29. **LC0452.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277437)

## Votes

- Do Pass — **97–0** (pass) · lower
- do_pass_as_amended — **20–0** (pass) · lower
- Do Concur — **40–9** (pass) · upper
- Do Pass — **100–0** (pass) · lower
- Do Concur — **41–8** (pass) · upper
- be_concurred_in — **11–0** (pass) · upper

## Sponsors

- Ed Buttrey — primary (person)

## Timeline

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

- **2024-10-04T19:07:29+00:00** (LC) Drafter Assigned
- **2024-10-04T19:07:29+00:00** (LC) Draft On Hold
- **2025-01-14T18:55:05+00:00** (LC) Draft Taken Off Hold
- **2025-01-28T22:15:36+00:00** (LC) Draft in Legal Review
- **2025-01-29T20:47:53+00:00** (LC) Draft in Edit
- **2025-01-30T21:26:32+00:00** (LC) Draft in Input/Proofing
- **2025-01-31T01:21:47+00:00** (LC) Draft in Final Drafter Review
- **2025-01-31T22:23:43+00:00** (LC) Draft in Assembly
- **2025-02-04T01:12:18+00:00** (LC) Draft Ready for Delivery
- **2025-02-18T17:53:15+00:00** (LC) Draft Delivered to Requester
- **2025-02-19T20:07:50+00:00** (H) Introduced
- **2025-02-19T20:14:27+00:00** (H) Fiscal Note Requested
- **2025-02-20T18:56:34+00:00** (H) Referred to Committee - (H) Business and Labor `referral-committee`
- **2025-02-20T19:51:28+00:00** (H) First Reading `reading-1`
- **2025-02-26T18:36:29+00:00** (H) Fiscal Note Received `receipt`
- **2025-02-26T21:18:01+00:00** (H) Fiscal Note Signed
- **2025-02-27T16:19:00+00:00** (H) Fiscal Note Printed
- **2025-03-17T21:09:45+00:00** (H) Hearing - (H) Business and Labor
- **2025-04-01T17:42:42+00:00** (H) Committee Executive Action--Bill Passed as Amended - (H) Business and Labor `committee-passage`
- **2025-04-01T20:40:00+00:00** (H) Committee Report--Bill Passed as Amended - (H) Business and Labor `committee-passage`
- **2025-04-03T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-04-03T19:52:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2025-04-05T14:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-04-05T14:42:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2025-04-05T15:46:27+00:00** (H) Transmitted to Senate
- **2025-04-07T19:13:37+00:00** (S) First Reading `reading-1`
- **2025-04-07T19:25:00+00:00** (S) Referred to Committee - (S) Business, Labor and Economic Affairs `referral-committee`
- **2025-04-08T00:48:38+00:00** (S) Hearing - (S) Business, Labor and Economic Affairs
- **2025-04-09T20:04:00+00:00** (S) Hearing - (S) Business, Labor and Economic Affairs
- **2025-04-15T16:55:30+00:00** (S) Hearing - (S) Business, Labor and Economic Affairs
- **2025-04-16T17:04:49+00:00** (S) Committee Executive Action--Bill Concurred - (S) Business, Labor and Economic Affairs
- **2025-04-16T19:26:00+00:00** (S) Committee Report--Bill Concurred - (S) Business, Labor and Economic Affairs
- **2025-04-18T15:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-04-18T18:23:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2025-04-22T18:30:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-04-22T20:23:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2025-04-22T20:23:42+00:00** (H) Sent to Enrolling
- **2025-04-25T17:16:16+00:00** (H) Returned from Enrolling
- **2025-05-02T17:00:20+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`
- **2025-05-13T18:50:00+00:00** (H) Signed by Governor `executive-signature`
- **2025-05-19T22:25:23+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/cd22f08d-3e44-4797-9d9f-6bcfeba0fe47`. Confidence: reported (aggregated from official Montana legislature records).