---
type: "Bill"
title: "Revise aeronautics laws related to the use of ADS–B information"
description: "Revise aeronautics laws related to the use of ADS–B information"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "HB 571"
citation: "Montana HB 571 (2025)"
classification: ["bill"]
subjects: ["Transportation"]
status: "enacted"
primary_sponsors: ["Shane Klakken"]
version_count: 31
action_count: 38
vote_count: 8
first_action: "2024-12-20T14:31:34+00:00"
last_action: "2025-05-13T16:47:18+00:00"
source: "openstates"
source_identifier: "ocd-bill/4fa76f7d-6463-4968-94e9-125084052bf1"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC4174?open_tab=sum"
source_hash: "ab5d63837dd01be2f7f60892ab12c2ca112f8077e19f7b481c163629dd1c70c7"
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 571 (2025) — Revise aeronautics laws related to the use of ADS–B information

## Version chain

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

1. **HB0571.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=297883)
2. **HB0571_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284400)
3. **HB0571_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=293335)
4. **HB0571_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302526)
5. **HB0571_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303214)
6. **HB0571_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303215)
7. **HB0571_1(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303216)
8. **HB0571_1(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303217)
9. **HB0571_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284052)
10. **HB0571_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303219)
11. **HB0571_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303220)
12. **HB0571_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303232)
13. **HB0571_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303239)
14. **HB0571_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303251)
15. **HB0571_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=306725)
16. **HB0571_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312567)
17. **HB0571_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312572)
18. **HB0571_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303218)
19. **HB0571_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312575)
20. **HB0571_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=322423)
21. **HB0571_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324869)
22. **HB0571_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313211)
23. **HB0571_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313212)
24. **HB0571_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313231)
25. **HB0571_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313232)
26. **HB0571_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317120)
27. **HB0571_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320684)
28. **HB0571_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=322421)
29. **HB0571_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=322422)
30. **HB0571_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312574)
31. **LC4174.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=282569)

## Votes

- Do Pass — **56–43** (pass) · lower
- be_concurred_in_as_amended — **7–6** (pass) · upper
- Do Pass — **60–39** (pass) · lower
- Do Concur — **66–32** (pass) · lower
- do_pass — **9–5** (pass) · lower
- Do Concur — **30–18** (pass) · upper
- Do Concur — **97–3** (pass) · lower
- Do Concur — **31–18** (pass) · upper

## Sponsors

- Shane Klakken — primary (person)

## Timeline

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

- **2024-12-20T14:31:34+00:00** (LC) Drafter Assigned
- **2025-02-12T20:06:16+00:00** (LC) Draft in Legal Review
- **2025-02-12T21:26:39+00:00** (LC) Draft in Edit
- **2025-02-14T18:14:27+00:00** (LC) Draft in Input/Proofing
- **2025-02-14T20:52:43+00:00** (LC) Draft in Final Drafter Review
- **2025-02-14T21:40:55+00:00** (LC) Draft in Assembly
- **2025-02-15T18:08:46+00:00** (LC) Draft Ready for Delivery
- **2025-02-18T15:29:53+00:00** (LC) Draft Delivered to Requester
- **2025-02-19T14:39:10+00:00** (H) Introduced
- **2025-02-19T19:27:40+00:00** (H) Referred to Committee - (H) Transportation `referral-committee`
- **2025-02-19T19:52:09+00:00** (H) First Reading `reading-1`
- **2025-02-20T19:10:10+00:00** (H) Hearing - (H) Transportation
- **2025-02-27T01:23:12+00:00** (H) Committee Executive Action--Bill Passed - (H) Transportation `committee-passage`
- **2025-02-27T20:11:00+00:00** (H) Committee Report--Bill Passed - (H) Transportation `committee-passage`
- **2025-03-05T01:14:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2025-03-06T15:27:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2025-03-06T19:13:45+00:00** (H) Transmitted to Senate
- **2025-03-12T17:51:24+00:00** (S) Hearing - (S) Energy, Technology & Federal Relations
- **2025-03-14T23:06:17+00:00** (S) First Reading `reading-1`
- **2025-03-14T23:30:00+00:00** (S) Referred to Committee - (S) Energy, Technology & Federal Relations `referral-committee`
- **2025-04-01T23:46:07+00:00** (S) Committee Executive Action--Bill Concurred as Amended - (S) Energy, Technology & Federal Relations
- **2025-04-02T19:36:00+00:00** (S) Committee Report--Bill Concurred as Amended - (S) Energy, Technology & Federal Relations
- **2025-04-07T19:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-04-07T20:02:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2025-04-08T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-04-08T20:42:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2025-04-08T21:47:29+00:00** (S) Returned to House with Amendments
- **2025-04-15T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-04-15T20:11:00+00:00** (H) 2nd Reading Senate Amendments Concurred `amendment-amendment, amendment-passage, reading-2, reading-2`
- **2025-04-16T19:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-04-16T21:07:00+00:00** (H) 3rd Reading Passed as Amended by Senate `passage, passage, reading-3, reading-3`
- **2025-04-16T21:52:01+00:00** (H) Sent to Enrolling
- **2025-04-18T14:59:25+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`
- **2025-05-13T16:47:18+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/4fa76f7d-6463-4968-94e9-125084052bf1`. Confidence: reported (aggregated from official Montana legislature records).