---
type: "Bill"
title: "Provide for regulation and sale of aquaculture"
description: "Provide for regulation and sale of aquaculture"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "SB 161"
citation: "Montana SB 161 (2025)"
classification: ["bill"]
subjects: ["Agriculture", "Fish", "Rule Making", "Safety", "Water"]
status: "enacted"
primary_sponsors: ["Greg Hertz"]
version_count: 68
action_count: 45
vote_count: 9
first_action: "2024-11-11T15:59:14+00:00"
last_action: "2025-05-05T17:35:38+00:00"
source: "openstates"
source_identifier: "ocd-bill/7a11b0b8-be81-4d03-8c96-a5dc637f2e13"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC1006?open_tab=sum"
source_hash: "571ed7338efd2fe024e97a7b450fd65f10954e004d3c88a92371107064ba0a8e"
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 161 (2025) — Provide for regulation and sale of aquaculture

## Version chain

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

1. **LC1006.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=271269)
2. **SB0161.001.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277349)
3. **SB0161.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277348)
4. **SB0161.002.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=295673)
5. **SB0161.002.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=295672)
6. **SB0161.003.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=297014)
7. **SB0161.003.001_Amendments-in-Context_final-full(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=297015)
8. **SB0161.003.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=297013)
9. **SB0161_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=271874)
10. **SB0161_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272446)
11. **SB0161_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=275351)
12. **SB0161_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=276400)
13. **SB0161_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277831)
14. **SB0161_1(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277832)
15. **SB0161_1(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277833)
16. **SB0161_1(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277834)
17. **SB0161_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=271866)
18. **SB0161_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277836)
19. **SB0161_2(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296727)
20. **SB0161_2(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296728)
21. **SB0161_2(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296729)
22. **SB0161_2(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296730)
23. **SB0161_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277840)
24. **SB0161_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277841)
25. **SB0161_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277925)
26. **SB0161_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277926)
27. **SB0161_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277951)
28. **SB0161_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=281891)
29. **SB0161_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=283887)
30. **SB0161_2(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296307)
31. **SB0161_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=277835)
32. **SB0161_3(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296732)
33. **SB0161_3(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296733)
34. **SB0161_3(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296767)
35. **SB0161_3(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296768)
36. **SB0161_3(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296772)
37. **SB0161_3(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301205)
38. **SB0161_3(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301206)
39. **SB0161_3(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301207)
40. **SB0161_3(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301208)
41. **SB0161_3.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=296731)
42. **SB0161_4(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301210)
43. **SB0161_4(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=304975)
44. **SB0161_4(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=304976)
45. **SB0161_4(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305261)
46. **SB0161_4(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305262)
47. **SB0161_4(14).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305371)
48. **SB0161_4(15).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305372)
49. **SB0161_4(16).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305918)
50. **SB0161_4(17).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=305927)
51. **SB0161_4(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301213)
52. **SB0161_4(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301214)
53. **SB0161_4(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301218)
54. **SB0161_4(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301221)
55. **SB0161_4(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301222)
56. **SB0161_4(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=302306)
57. **SB0161_4(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=304969)
58. **SB0161_4(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=304970)
59. **SB0161_4.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301209)
60. **SB0161_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=316737)
61. **SB0161_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320317)
62. **SB0161_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321662)
63. **SB0161_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321663)
64. **SB0161_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321664)
65. **SB0161_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324715)
66. **SB0161_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=326054)
67. **SB0161_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=327457)
68. **SB0161_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310794)

## Votes

- be_concurred_in_as_amended — **17–0** (pass) · lower
- Do Pass — **47–3** (pass) · upper
- Do Concur — **97–2** (pass) · lower
- Do Pass As Amended — **99–1** (pass) · lower
- Do Pass — **46–4** (pass) · upper
- Do Pass — **48–2** (pass) · upper
- AMD-SB0161.003.001 Wirth DO PASS — **99–0** (pass) · lower
- Do Pass — **47–2** (pass) · upper
- do_pass_as_amended — **11–0** (pass) · upper

## Sponsors

- Greg Hertz — primary (person)

## Timeline

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

- **2024-11-11T15:59:14+00:00** (LC) Drafter Assigned
- **2025-01-08T19:31:05+00:00** (LC) Draft in Legal Review
- **2025-01-08T22:31:33+00:00** (LC) Draft in Edit
- **2025-01-13T22:59:19+00:00** (LC) Draft in Input/Proofing
- **2025-01-14T00:34:35+00:00** (LC) Draft in Final Drafter Review
- **2025-01-14T17:40:37+00:00** (LC) Draft in Assembly
- **2025-01-15T01:25:21+00:00** (LC) Draft Ready for Delivery
- **2025-01-15T21:52:00+00:00** (LC) Draft Delivered to Requester
- **2025-01-15T22:02:01+00:00** (S) Introduced
- **2025-01-16T20:15:47+00:00** (S) First Reading `reading-1`
- **2025-01-17T14:12:00+00:00** (S) Referred to Committee - (S) Agriculture, Livestock and Irrigation `referral-committee`
- **2025-01-24T14:59:25+00:00** (S) Hearing - (S) Agriculture, Livestock and Irrigation
- **2025-01-31T19:00:00+00:00** (S) Committee Executive Action--Bill Passed as Amended - (S) Agriculture, Livestock and Irrigation `committee-passage`
- **2025-01-31T20:19:00+00:00** (S) Committee Report--Bill Passed as Amended - (S) Agriculture, Livestock and Irrigation `committee-passage`
- **2025-02-15T09:21:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-02-15T16:49:00+00:00** (S) 2nd Reading Passed `reading-2, reading-2`
- **2025-02-18T09:21:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-02-18T21:32:00+00:00** (S) 3rd Reading Passed `passage, reading-3`
- **2025-02-18T22:50:46+00:00** (S) Transmitted to House
- **2025-02-19T18:57:27+00:00** (H) Referred to Committee - (H) Agriculture `referral-committee`
- **2025-02-19T20:12:01+00:00** (H) First Reading `reading-1`
- **2025-02-19T21:38:56+00:00** (S) Fiscal Note Requested
- **2025-02-24T21:39:03+00:00** (S) Fiscal Note Received `receipt`
- **2025-02-24T21:39:11+00:00** (S) Fiscal Note Unsigned
- **2025-02-25T15:41:42+00:00** (S) Fiscal Note Printed
- **2025-03-17T22:33:21+00:00** (H) Hearing - (H) Agriculture
- **2025-03-20T22:36:13+00:00** (H) Committee Executive Action--Bill Concurred as Amended - (H) Agriculture
- **2025-03-21T19:45:00+00:00** (H) Committee Report--Bill Concurred as Amended - (H) Agriculture
- **2025-03-28T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-03-28T20:14:00+00:00** (H) 2nd Reading Motion to Amend Carried `reading-2`
- **2025-03-28T20:15:00+00:00** (H) 2nd Reading Concurred as Amended `reading-2, reading-2`
- **2025-04-01T19:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-04-01T19:54:00+00:00** (H) 3rd Reading Concurred `passage, reading-3`
- **2025-04-01T21:25:21+00:00** (H) Returned to Senate with Amendments
- **2025-04-03T19:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-04-03T21:09:00+00:00** (S) 2nd Reading House Amendments Concurred `amendment-amendment, amendment-passage, reading-2, reading-2`
- **2025-04-04T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-04-04T19:25:00+00:00** (S) 3rd Reading Passed as Amended by House `passage, passage, reading-3, reading-3`
- **2025-04-04T21:01:21+00:00** (S) Sent to Enrolling
- **2025-04-06T00:03:33+00:00** (S) Returned from Enrolling
- **2025-04-13T21:00:21+00:00** (S) Signed by President `passage`
- **2025-04-18T19:00:38+00:00** (H) Signed by Speaker `passage`
- **2025-04-22T15:18:05+00:00** (S) Transmitted to Governor `executive-receipt`
- **2025-05-01T18:33:04+00:00** (S) Signed by Governor `executive-signature`
- **2025-05-05T17:35:38+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/7a11b0b8-be81-4d03-8c96-a5dc637f2e13`. Confidence: reported (aggregated from official Montana legislature records).