---
type: "Bill"
title: "Revise drug laws"
description: "Revise drug laws"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2023"
identifier: "HB 437"
citation: "Montana HB 437 (2023)"
classification: ["bill"]
subjects: ["Alcohol and Drugs", "Crimes"]
status: "enacted"
primary_sponsors: ["Katie Zolnikov"]
version_count: 10
action_count: 60
vote_count: 13
first_action: "2022-11-30T16:56:00+00:00"
last_action: "2023-05-22T18:48:34+00:00"
source: "openstates"
source_identifier: "ocd-bill/684cf95a-8589-47ca-b926-aca757ef77d7"
source_url: "https://bills.legmt.gov/#/bill/20231/LC1826"
source_hash: "73edd8cde5aabf0e1ad95a4c33554e1b4c230bee15bb8f6a0d0e20a4a24dc20b"
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 437 (2023) — Revise drug laws

## Version chain

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

1. **HB0437.001.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12611)
2. **HB0437.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12610)
3. **HB0437.002.001.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12612)
4. **HB0437.002.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12613)
5. **HB0437.002.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12614)
6. **HB0437.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12618)
7. **HB0437_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12616)
8. **HB0437_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12615)
9. **HB0437_3.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12619)
10. **HB0437_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12617)

## Votes

- (S) Committee Executive Action--Bill Concurred as Amended — **10–0** (pass) · upper
- (S) 3rd Reading Concurred — **44–6** (pass) · upper
- (H) Conference Committee Report Received — **6–0** (pass) · lower
- (H) 2nd Reading Senate Amendments Not Concurred — **100–0** (pass) · lower
- (H) 2nd Reading Conference Committee Report Adopted — **99–0** (pass) · lower
- (S) 3rd Reading Conference Committee Report Adopted — **46–3** (pass) · upper
- (H) 3rd Reading Conference Committee Report Adopted — **96–0** (pass) · lower
- (H) 2nd Reading Passed — **100–0** (pass) · lower
- (S) Conference Committee Report Received — **6–0** (pass) · upper
- (H) Committee Executive Action--Bill Passed — **19–0** (pass) · lower
- (S) 2nd Reading Conference Committee Report Adopted — **39–10** (pass) · upper
- (S) 2nd Reading Concurred — **40–10** (pass) · upper
- (H) 3rd Reading Passed — **98–1** (pass) · lower

## Sponsors

- Katie Zolnikov — primary (person)

## Timeline

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

- **2023-05-22T18:48:34+00:00** Chapter Number Assigned `became-law`
- **2023-05-22T17:23:00+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`
- **2023-05-11T15:39:17+00:00** (C) Printed - Enrolled Version Available `enrolled`
- **2023-05-11T15:39:16+00:00** (H) Returned from Enrolling
- **2023-05-05T19:58:33+00:00** (C) Printed - New Version Available
- **2023-05-03T20:56:33+00:00** (H) Sent to Enrolling
- **2023-05-03T02:33:00+00:00** (H) 3rd Reading Conference Committee Report Adopted `reading-3`
- **2023-05-03T00:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2023-05-02T17:26:00+00:00** (H) 2nd Reading Conference Committee Report Adopted `reading-2, reading-2`
- **2023-05-02T14:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2023-05-01T23:43:00+00:00** (S) 3rd Reading Conference Committee Report Adopted `reading-3`
- **2023-05-01T23:15:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2023-05-01T21:12:00+00:00** (S) 2nd Reading Conference Committee Report Adopted `reading-2, reading-2`
- **2023-05-01T19:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-04-28T16:00:01+00:00** (H) Conference Committee Report Received `receipt`
- **2023-04-28T16:00:00+00:00** (S) Conference Committee Report Received `receipt`
- **2023-04-28T14:00:00+00:00** (H) Hearing
- **2023-04-25T21:13:00+00:00** (S) Conference Committee Appointed
- **2023-04-24T23:23:00+00:00** (H) Conference Committee Appointed
- **2023-04-24T20:02:00+00:00** (H) 2nd Reading Senate Amendments Not Concurred `reading-2`
- **2023-04-19T02:11:00+00:00** (S) Returned to House with Amendments
- **2023-04-18T22:04:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2023-04-18T20:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2023-04-18T01:36:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2023-04-17T22:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-04-17T19:14:12+00:00** (C) Printed - New Version Available
- **2023-04-17T16:45:00+00:00** (S) Committee Report--Bill Concurred as Amended
- **2023-04-17T14:00:01+00:00** (S) Committee Executive Action--Bill Concurred as Amended
- **2023-04-17T14:00:00+00:00** (S) Hearing
- **2023-04-14T22:34:53+00:00** (C) Amendments Available
- **2023-04-14T15:57:56+00:00** (S) Referred to Committee `referral-committee`
- **2023-02-24T21:30:00+00:00** (S) First Reading `reading-1`
- **2023-02-24T18:24:00+00:00** (H) Transmitted to Senate
- **2023-02-23T22:13:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2023-02-22T21:06:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2023-02-16T20:20:00+00:00** (H) Committee Report--Bill Passed `committee-passage`
- **2023-02-16T15:00:00+00:00** (H) Committee Executive Action--Bill Passed `committee-passage`
- **2023-02-15T15:00:38+00:00** (H) Hearing
- **2023-02-09T20:20:03+00:00** (H) First Reading `reading-1`
- **2023-02-09T19:08:24+00:00** (H) Referred to Committee `referral-committee`
- **2023-02-07T22:02:18+00:00** (C) Introduced Bill Text Available Electronically
- **2023-02-07T20:40:21+00:00** (H) Introduced
- **2023-02-07T18:19:07+00:00** (C) Draft Delivered to Requester
- **2023-01-31T17:17:24+00:00** (C) Executive Director Final Review
- **2023-01-31T17:17:15+00:00** (C) Draft Ready for Delivery
- **2023-01-30T21:50:22+00:00** (C) Draft in Assembly
- **2023-01-30T20:19:40+00:00** (C) Executive Director Review
- **2023-01-30T18:09:17+00:00** (C) Bill Draft Text Available Electronically
- **2023-01-30T18:09:16+00:00** (C) Draft in Final Drafter Review
- **2023-01-30T17:33:06+00:00** (C) Draft in Input/Proofing
- **2023-01-29T00:55:04+00:00** (C) Draft to Drafter - Edit Review
- **2023-01-28T21:48:38+00:00** (C) Draft in Edit
- **2023-01-25T14:25:17+00:00** (C) Draft in Legal Review
- **2023-01-23T17:26:01+00:00** (C) Draft to Requester for Review
- **2023-01-18T20:01:15+00:00** (C) Draft Taken Off Hold
- **2022-11-30T23:13:35+00:00** (C) Draft On Hold
- **2022-11-30T16:56:00+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/684cf95a-8589-47ca-b926-aca757ef77d7`. Confidence: reported (aggregated from official Montana legislature records).