---
type: "Bill"
title: "Generally revise marijuana laws related to testing laboratories"
description: "Generally revise marijuana laws related to testing laboratories"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2023"
identifier: "HB 229"
citation: "Montana HB 229 (2023)"
classification: ["bill"]
subjects: ["Alcohol and Drugs"]
status: "enacted"
primary_sponsors: ["Mike Hopkins"]
version_count: 21
action_count: 68
vote_count: 13
first_action: "2022-10-05T19:49:10+00:00"
last_action: "2023-05-22T18:38:03+00:00"
source: "openstates"
source_identifier: "ocd-bill/32a30ad1-d6b6-48a4-bb13-08fb46aa3607"
source_url: "https://bills.legmt.gov/#/bill/20231/LC0632"
source_hash: "6e2923569b5cc2fb1d492328093f9dba9b54593c9a978eb20e08adfc86c145a9"
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 229 (2023) — Generally revise marijuana laws related to testing laboratories

## Version chain

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

1. **HB0229.001.001_Amendments-in-Context_final-condensed (1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5875)
2. **HB0229.001.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5879)
3. **HB0229.001.001_Amendments-in-Context_final-full (1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5881)
4. **HB0229.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5876)
5. **HB0229.002.002_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5883)
6. **HB0229.002.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5887)
7. **HB0229.002.003_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5878)
8. **HB0229.002.003_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5888)
9. **HB0229.002.004_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5882)
10. **HB0229.002.004_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5886)
11. **HB0229.003.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5885)
12. **HB0229.003.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5880)
13. **HB0229.003.002(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5890)
14. **HB0229.003.002.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5889)
15. **HB0229.003.002_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5884)
16. **HB0229.003.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5877)
17. **HB0229_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5891)
18. **HB0229_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5895)
19. **HB0229_3.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5894)
20. **HB0229_4.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5893)
21. **HB0229_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=5892)

## Votes

- (S) 3rd Reading Concurred — **46–4** (pass) · upper
- (H) 2nd Reading Free Conference Committee Report Adopted — **64–34** (pass) · lower
- (S) Free Conference Committee Report Received — **6–0** (pass) · upper
- (S) 3rd Reading Free Conference Committee Report Adopted — **36–14** (pass) · upper
- (H) 3rd Reading Free Conference Committee Report Adopted — **78–18** (pass) · lower
- (H) 2nd Reading Passed — **77–22** (pass) · lower
- (H) 2nd Reading Senate Amendments Not Concurred — **72–28** (pass) · lower
- (S) 2nd Reading Concurred — **41–9** (pass) · upper
- (S) 2nd Reading Free Conference Committee Report Adopted — **38–12** (pass) · upper
- (S) Committee Executive Action--Bill Concurred as Amended — **10–0** (pass) · upper
- (H) 3rd Reading Passed — **79–18** (pass) · lower
- (H) Free Conference Committee Report Received — **6–0** (pass) · lower
- (H) Committee Executive Action--Bill Passed as Amended — **14–5** (pass) · lower

## Sponsors

- Mike Hopkins — primary (person)

## Timeline

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

- **2023-05-22T18:38:03+00:00** Chapter Number Assigned `became-law`
- **2023-05-22T17:18:00+00:00** (H) Signed by Governor `executive-signature`
- **2023-05-12T17:30:00+00:00** (H) Transmitted to Governor `executive-receipt`
- **2023-05-11T23:00:00+00:00** (S) Signed by President `passage`
- **2023-05-11T18:00:00+00:00** (H) Signed by Speaker `passage`
- **2023-05-09T14:40:55+00:00** (C) Printed - Enrolled Version Available `enrolled`
- **2023-05-09T14:40:54+00:00** (H) Returned from Enrolling
- **2023-05-05T20:19:29+00:00** (C) Printed - New Version Available
- **2023-05-03T20:55:59+00:00** (H) Sent to Enrolling
- **2023-05-03T02:37:00+00:00** (H) 3rd Reading Free Conference Committee Report Adopted
- **2023-05-03T00:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2023-05-02T21:30:00+00:00** (S) 3rd Reading Free Conference Committee Report Adopted
- **2023-05-02T20:16:00+00:00** (S) 2nd Reading Free Conference Committee Report Adopted `reading-2`
- **2023-05-02T20:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-05-02T19:39:00+00:00** (H) 2nd Reading Free Conference Committee Report Adopted `reading-2`
- **2023-05-02T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2023-05-01T23:17:00+00:00** (S) Free Conference Committee Report Received `receipt`
- **2023-05-01T15:00:02+00:00** (H) Free Conference Committee Report Received `receipt`
- **2023-05-01T15:00:00+00:00** (S) Hearing
- **2023-04-29T16:24:00+00:00** (S) Free Conference Committee Appointed
- **2023-04-28T20:53:00+00:00** (H) Free Conference Committee Appointed
- **2023-04-28T20:46:00+00:00** (H) Conference Committee Dissolved
- **2023-04-25T22:44:00+00:00** (S) Conference Committee Appointed
- **2023-04-24T23:20:00+00:00** (H) Conference Committee Appointed
- **2023-04-24T19:48:00+00:00** (H) 2nd Reading Senate Amendments Not Concurred `reading-2`
- **2023-04-19T02:05:00+00:00** (S) Returned to House with Amendments
- **2023-04-18T21:58:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2023-04-18T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2023-04-18T03:03:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2023-04-17T23:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-04-15T01:35:35+00:00** (C) Printed - New Version Available
- **2023-04-14T23:39:00+00:00** (S) Committee Report--Bill Concurred as Amended
- **2023-04-14T21:00:00+00:00** (S) Committee Executive Action--Bill Concurred as Amended
- **2023-03-31T14:00:00+00:00** (S) Hearing
- **2023-03-28T14:09:18+00:00** (S) Hearing Canceled
- **2023-03-20T23:46:02+00:00** (S) Referred to Committee `referral-committee`
- **2023-02-14T22:00:00+00:00** (S) First Reading `reading-1`
- **2023-02-14T21:57:21+00:00** (H) Transmitted to Senate
- **2023-02-13T21:54:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2023-02-13T20:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2023-02-10T20:39:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2023-02-07T20:44:28+00:00** (C) Printed - New Version Available
- **2023-02-07T20:13:00+00:00** (H) Committee Report--Bill Passed as Amended `committee-passage`
- **2023-02-07T18:36:16+00:00** (H) Committee Executive Action--Bill Passed as Amended `committee-passage`
- **2023-02-06T20:57:14+00:00** (C) Amendments Available
- **2023-02-01T15:30:34+00:00** (H) Hearing
- **2023-01-13T20:10:40+00:00** (H) First Reading `reading-1`
- **2023-01-13T17:05:07+00:00** (H) Referred to Committee `referral-committee`
- **2023-01-12T17:44:37+00:00** (C) Introduced Bill Text Available Electronically
- **2023-01-11T23:47:51+00:00** (H) Introduced
- **2023-01-11T22:35:53+00:00** (C) Draft Delivered to Requester
- **2023-01-10T17:17:54+00:00** (C) Draft Ready for Delivery
- **2023-01-09T22:34:11+00:00** (C) Executive Director Final Review
- **2023-01-09T22:34:03+00:00** (C) Draft Ready for Delivery
- **2023-01-09T22:22:00+00:00** (C) Draft in Assembly
- **2023-01-09T20:00:46+00:00** (C) Executive Director Review
- **2023-01-09T18:28:59+00:00** (C) Bill Draft Text Available Electronically
- **2023-01-09T18:28:58+00:00** (C) Draft in Final Drafter Review
- **2023-01-07T22:48:32+00:00** (C) Draft in Input/Proofing
- **2023-01-07T20:29:01+00:00** (C) Draft to Drafter - Edit Review
- **2023-01-06T22:15:30+00:00** (C) Draft in Edit
- **2023-01-06T21:04:12+00:00** (C) Draft in Legal Review
- **2023-01-06T14:04:44+00:00** (C) Draft to Requester for Review
- **2023-01-06T00:23:38+00:00** (C) Draft to Requester for Review
- **2023-01-04T23:18:55+00:00** (C) Draft Taken Off Hold
- **2023-01-04T23:18:30+00:00** (C) Draft On Hold
- **2022-11-18T22:53:03+00:00** (C) Draft On Hold
- **2022-10-05T19:49:10+00:00** (C) Draft Request Received `receipt`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/32a30ad1-d6b6-48a4-bb13-08fb46aa3607`. Confidence: reported (aggregated from official Montana legislature records).