---
type: "Bill"
title: "Exempt GHG emissions analysis for appliances, vehicles, engines"
description: "Exempt GHG emissions analysis for appliances, vehicles, engines"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "HB 703"
citation: "Montana HB 703 (2025)"
classification: ["bill"]
subjects: ["Buildings and Building Regulations", "Environmental Protection", "Rule Making"]
status: "enacted"
primary_sponsors: ["Curtis Schomer"]
version_count: 43
action_count: 40
vote_count: 8
first_action: "2024-12-08T02:10:59+00:00"
last_action: "2025-05-13T17:27:31+00:00"
source: "openstates"
source_identifier: "ocd-bill/6d17289e-fe0b-446f-a7ea-b68776097172"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC2339?open_tab=sum"
source_hash: "c38839f821695b55c028cf18e83cc8b1fe1121cff091a6309e4dd4903280c4de"
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 703 (2025) — Exempt GHG emissions analysis for appliances, vehicles, engines

## Version chain

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

1. **HB0703.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305851)
2. **HB0703.001.001_Amendments-in-Context_final-not condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305840)
3. **HB0703_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=287619)
4. **HB0703_1(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=306445)
5. **HB0703_1(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313752)
6. **HB0703_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293902)
7. **HB0703_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=294082)
8. **HB0703_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305747)
9. **HB0703_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305765)
10. **HB0703_1(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=306094)
11. **HB0703_1(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=306442)
12. **HB0703_1(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=306443)
13. **HB0703_1(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=306444)
14. **HB0703_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=286599)
15. **HB0703_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=306666)
16. **HB0703_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=308984)
17. **HB0703_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313521)
18. **HB0703_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313522)
19. **HB0703_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313523)
20. **HB0703_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313525)
21. **HB0703_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313526)
22. **HB0703_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313753)
23. **HB0703_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=306648)
24. **HB0703_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313528)
25. **HB0703_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313758)
26. **HB0703_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313759)
27. **HB0703_X(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317270)
28. **HB0703_X(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320782)
29. **HB0703_X(14).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=322454)
30. **HB0703_X(15).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=322455)
31. **HB0703_X(16).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=322456)
32. **HB0703_X(17).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324880)
33. **HB0703_X(18).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=326565)
34. **HB0703_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313529)
35. **HB0703_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313743)
36. **HB0703_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313746)
37. **HB0703_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313747)
38. **HB0703_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313751)
39. **HB0703_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313754)
40. **HB0703_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313755)
41. **HB0703_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313756)
42. **HB0703_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313527)
43. **LC2339.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284654)

## Votes

- Do Concur — **36–12** (pass) · upper
- Do Pass — **58–41** (pass) · lower
- Do Concur — **98–2** (pass) · lower
- do_pass — **8–6** (pass) · lower
- be_concurred_in_as_amended — **8–3** (pass) · upper
- Do Pass — **57–42** (pass) · lower
- Do Concur — **61–37** (pass) · lower
- Do Concur — **36–12** (pass) · upper

## Sponsors

- Curtis Schomer — primary (person)

## Timeline

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

- **2024-12-08T02:10:59+00:00** (LC) Drafter Assigned
- **2024-12-08T02:10:59+00:00** (LC) Draft On Hold
- **2025-01-09T16:08:07+00:00** (LC) Draft Taken Off Hold
- **2025-02-12T01:58:35+00:00** (LC) Draft in Legal Review
- **2025-02-15T14:46:07+00:00** (LC) Draft in Edit
- **2025-02-19T23:08:55+00:00** (LC) Draft in Input/Proofing
- **2025-02-21T16:38:18+00:00** (LC) Draft in Final Drafter Review
- **2025-02-21T17:18:17+00:00** (LC) Draft in Assembly
- **2025-02-22T15:44:19+00:00** (LC) Draft Ready for Delivery
- **2025-02-24T16:34:29+00:00** (LC) Draft Delivered to Requester
- **2025-02-24T19:44:29+00:00** (H) Introduced
- **2025-02-25T18:13:33+00:00** (H) Referred to Committee - (H) Natural Resources `referral-committee`
- **2025-02-25T20:06:19+00:00** (H) First Reading `reading-1`
- **2025-02-27T20:43:18+00:00** (H) Hearing - (H) Natural Resources
- **2025-03-03T23:00:50+00:00** (H) Committee Executive Action--Bill Passed - (H) Natural Resources `committee-passage`
- **2025-03-04T01:36:48+00:00** (H) Committee Report--Bill Passed - (H) Natural Resources `committee-passage`
- **2025-03-06T22:51:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2025-03-07T17:28:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2025-03-07T18:00:00+00:00** (H) Transmitted to Senate
- **2025-03-15T00:10:42+00:00** (S) First Reading `reading-1`
- **2025-03-17T15:15:22+00:00** (S) Referred to Committee - (S) Natural Resources `referral-committee`
- **2025-04-03T01:36:06+00:00** (S) Hearing - (S) Natural Resources
- **2025-04-08T00:35:08+00:00** (S) Committee Executive Action--Bill Concurred as Amended - (S) Natural Resources
- **2025-04-08T19:29:00+00:00** (S) Committee Report--Bill Concurred as Amended - (S) Natural Resources
- **2025-04-10T14:30:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-04-10T19:42:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2025-04-11T16:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-04-11T21:46:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2025-04-12T00:05:26+00:00** (S) Returned to House with Amendments
- **2025-04-17T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-04-17T20:50:00+00:00** (H) 2nd Reading Senate Amendments Concurred `amendment-amendment, amendment-passage, reading-2, reading-2`
- **2025-04-18T16:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-04-18T17:19:00+00:00** (H) 3rd Reading Passed as Amended by Senate `passage, passage, reading-3, reading-3`
- **2025-04-18T19:11:38+00:00** (H) Sent to Enrolling
- **2025-04-20T19:03:40+00:00** (H) Returned from Enrolling
- **2025-04-29T22:00:37+00:00** (H) Signed by Speaker `passage`
- **2025-05-02T16:30:36+00:00** (S) Signed by President `passage`
- **2025-05-02T17:24:00+00:00** (H) Transmitted to Governor `executive-receipt`
- **2025-05-08T17:11:09+00:00** (H) Signed by Governor `executive-signature`
- **2025-05-13T17:27:31+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/6d17289e-fe0b-446f-a7ea-b68776097172`. Confidence: reported (aggregated from official Montana legislature records).