---
type: "Bill"
title: "Revising licensing and oversight entity for medical marijuana testing labs"
description: "Revising licensing and oversight entity for medical marijuana testing labs"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2019"
identifier: "HB 598"
citation: "Montana HB 598 (2019)"
classification: ["bill"]
subjects: ["Alcohol and Drugs", "Health (see also: Health Care Services; Safety)", "Rule Making"]
status: "enacted"
primary_sponsors: ["Mike Hopkins"]
version_count: 6
action_count: 69
vote_count: 11
first_action: "2018-12-05"
last_action: "2019-05-20"
source: "openstates"
source_identifier: "ocd-bill/71d82c31-6e14-42ef-97c6-38086d63df4b"
source_url: "http://laws.leg.mt.gov/legprd/LAW0210W$BSIV.ActionQuery?P_BILL_NO1=598&P_BLTP_BILL_TYP_CD=HB&Z_ACTION=Find&P_SESS=20191"
source_hash: "3921958e45e18728ec296e12ac32f277583d6dce3b4483c3f3865954aedc9989"
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 598 (2019) — Revising licensing and oversight entity for medical marijuana testing labs

## Version chain

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

1. **HB0598_1.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0599//HB0598_1.pdf)
2. **HB0598_2.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0599//HB0598_2.pdf)
3. **HB0598_3.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0599//HB0598_3.pdf)
4. **HB0598_4.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0599//HB0598_4.pdf)
5. **HB0598_x.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0599//HB0598_x.pdf)
6. **Enrolled** (enrolled) — [source](http://leg.mt.gov/bills/2019/billpdf/HB0598.pdf)

## Votes

- Do Pass — **88–11** (pass) · lower
- Do Concur — **82–15** (pass) · lower
- AMD-001 Cohenour D/PASS — **50–0** (pass) · upper
- Do Concur — **90–9** (pass) · lower
- BE CONCURRED IN — **7–3** (pass) · upper
- Do Concur — **42–8** (pass) · upper
- Do Concur As Amended — **47–3** (pass) · upper
- DO PASS AS AMENDED — **19–0** (pass) · lower
- Do Pass — **88–11** (pass) · lower
- DO PASS AS AMENDED — **18–4** (pass) · lower
- Do Pass — **91–9** (pass) · lower

## Sponsors

- Mike Hopkins — primary (person)

## Timeline

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

- **2018-12-05** Draft Request Received
- **2019-02-11** Draft On Hold
- **2019-02-14** Draft Taken Off Hold
- **2019-02-15** Draft to Requester for Review
- **2019-02-15** Draft in Legal Review
- **2019-02-16** Draft in Edit
- **2019-02-16** Draft to Drafter - Edit Review [CMD]
- **2019-02-16** Draft in Input/Proofing
- **2019-02-16** Draft in Final Drafter Review
- **2019-02-16** Bill Draft Text Available Electronically
- **2019-02-16** Executive Director Review
- **2019-02-18** Draft in Assembly
- **2019-02-18** Executive Director Final Review
- **2019-02-18** Draft Ready for Delivery
- **2019-02-19** Draft Delivered to Requester
- **2019-02-21** Fiscal Note Requested
- **2019-02-21** Introduced `introduction`
- **2019-02-21** Referred to Committee `referral-committee`
- **2019-02-21** First Reading `reading-1`
- **2019-02-21** Introduced Bill Text Available Electronically
- **2019-02-22** Legal Review Note
- **2019-02-25** Fiscal Note Received
- **2019-02-25** Fiscal Note Signed
- **2019-02-26** Fiscal Note Printed
- **2019-02-27** Hearing
- **2019-02-27** Committee Executive Action--Bill Passed as Amended `committee-passage`
- **2019-02-28** Committee Report--Bill Passed as Amended `committee-passage`
- **2019-02-28** Printed - New Version Available
- **2019-02-28** Scheduled for 2nd Reading
- **2019-02-28** 2nd Reading Passed `reading-2`
- **2019-02-28** Rereferred to Committee `referral-committee`
- **2019-02-28** Hearing
- **2019-02-28** Committee Executive Action--Bill Passed as Amended `committee-passage`
- **2019-02-28** Committee Report--Bill Passed as Amended `committee-passage`
- **2019-02-28** Scheduled for 2nd Reading
- **2019-02-28** Printed - New Version Available
- **2019-02-28** 2nd Reading Passed `reading-2`
- **2019-03-01** Scheduled for 3rd Reading
- **2019-03-01** 3rd Reading Passed `passage, reading-3`
- **2019-03-01** Transmitted to Senate
- **2019-03-07** First Reading `reading-1`
- **2019-03-09** Referred to Committee `referral-committee`
- **2019-03-12** Revised Fiscal Note Requested
- **2019-03-14** Revised Fiscal Note Received
- **2019-03-14** Revised Fiscal Note Signed
- **2019-03-15** Revised Fiscal Note Printed
- **2019-04-01** Hearing
- **2019-04-05** Committee Executive Action--Bill Concurred
- **2019-04-05** Committee Report--Bill Concurred
- **2019-04-09** Scheduled for 2nd Reading
- **2019-04-10** Scheduled for 2nd Reading
- **2019-04-10** 2nd Reading Motion to Amend Carried
- **2019-04-10** 2nd Reading Concurred as Amended `reading-2`
- **2019-04-10** Printed - New Version Available
- **2019-04-12** Scheduled for 3rd Reading
- **2019-04-12** 3rd Reading Concurred `passage, reading-3`
- **2019-04-12** Returned to House with Amendments
- **2019-04-16** Scheduled for 2nd Reading
- **2019-04-16** 2nd Reading Senate Amendments Concurred `amendment-passage, amendment-amendment, reading-2`
- **2019-04-17** Scheduled for 3rd Reading
- **2019-04-17** 3rd Reading Passed as Amended by Senate `passage, reading-3`
- **2019-04-17** Sent to Enrolling
- **2019-04-23** Returned from Enrolling
- **2019-04-23** Printed - Enrolled Version Available
- **2019-04-26** Signed by Speaker
- **2019-04-30** Signed by President
- **2019-05-01** Transmitted to Governor `executive-receipt`
- **2019-05-09** Signed by Governor `executive-signature`
- **2019-05-20** Chapter Number Assigned

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/71d82c31-6e14-42ef-97c6-38086d63df4b`. Confidence: reported (aggregated from official Montana legislature records).