---
type: "Bill"
title: "Revising pharmacy laws regarding vaccines"
description: "Revising pharmacy laws regarding vaccines"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2019"
identifier: "HB 231"
citation: "Montana HB 231 (2019)"
classification: ["bill"]
subjects: ["Health Care Services (see also: Health)", "Professions and Occupations O-Z", "Rule Making"]
status: "enacted"
primary_sponsors: ["Casey Knudsen"]
version_count: 6
action_count: 52
vote_count: 9
first_action: "2018-12-27"
last_action: "2019-05-20"
source: "openstates"
source_identifier: "ocd-bill/271990af-2fe9-4d47-901c-031fd20c1f06"
source_url: "http://laws.leg.mt.gov/legprd/LAW0210W$BSIV.ActionQuery?P_BILL_NO1=231&P_BLTP_BILL_TYP_CD=HB&Z_ACTION=Find&P_SESS=20191"
source_hash: "00a01c2a053d619b892bbbcd72cf70f6a87ab0829210e0a905dea6343f95487f"
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 231 (2019) — Revising pharmacy laws regarding vaccines

## Version chain

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

1. **HB0231_1.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0299//HB0231_1.pdf)
2. **HB0231_2.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0299//HB0231_2.pdf)
3. **HB0231_3.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0299//HB0231_3.pdf)
4. **HB0231_4.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0299//HB0231_4.pdf)
5. **HB0231_x.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0299//HB0231_x.pdf)
6. **Enrolled** (enrolled) — [source](http://leg.mt.gov/bills/2019/billpdf/HB0231.pdf)

## Votes

- Do Pass — **69–31** (pass) · lower
- Do Concur — **81–18** (pass) · lower
- Do Concur As Amended — **35–14** (pass) · upper
- AMD-001 Olszewski D/PASS — **46–3** (pass) · upper
- Do Concur — **30–18** (pass) · upper
- BE CONCURRED IN AS AMENDED — **8–2** (pass) · upper
- Do Pass — **64–29** (pass) · lower
- DO PASS AS AMENDED — **15–4** (pass) · lower
- Do Concur — **88–12** (pass) · lower

## Sponsors

- Casey Knudsen — primary (person)

## Timeline

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

- **2018-12-27** Draft Request Received
- **2019-01-08** Draft to Requester for Review
- **2019-01-08** Draft to Requester for Review
- **2019-01-09** Draft in Legal Review
- **2019-01-09** Draft in Edit
- **2019-01-10** Draft to Drafter - Edit Review [SMH]
- **2019-01-10** Draft in Input/Proofing
- **2019-01-11** Draft in Final Drafter Review
- **2019-01-11** Bill Draft Text Available Electronically
- **2019-01-11** Executive Director Review
- **2019-01-16** Draft in Assembly
- **2019-01-16** Executive Director Final Review
- **2019-01-16** Draft Ready for Delivery
- **2019-01-16** Draft Delivered to Requester
- **2019-01-17** Introduced `introduction`
- **2019-01-17** Referred to Committee `referral-committee`
- **2019-01-17** First Reading `reading-1`
- **2019-01-17** Introduced Bill Text Available Electronically
- **2019-02-06** Hearing
- **2019-02-15** Committee Executive Action--Bill Passed as Amended `committee-passage`
- **2019-02-18** Committee Report--Bill Passed as Amended `committee-passage`
- **2019-02-18** Printed - New Version Available
- **2019-02-22** Scheduled for 2nd Reading
- **2019-02-22** 2nd Reading Passed `reading-2`
- **2019-02-23** Scheduled for 3rd Reading
- **2019-02-23** 3rd Reading Passed `passage, reading-3`
- **2019-02-23** Transmitted to Senate
- **2019-02-25** First Reading `reading-1`
- **2019-02-25** Referred to Committee `referral-committee`
- **2019-03-11** Hearing
- **2019-03-25** Committee Executive Action--Bill Concurred as Amended
- **2019-03-26** Committee Report--Bill Concurred as Amended
- **2019-03-26** Printed - New Version Available
- **2019-04-02** Scheduled for 2nd Reading
- **2019-04-02** 2nd Reading Motion to Amend Carried
- **2019-04-02** 2nd Reading Concurred as Amended `reading-2`
- **2019-04-02** Printed - New Version Available
- **2019-04-04** Scheduled for 3rd Reading
- **2019-04-04** 3rd Reading Concurred `passage, reading-3`
- **2019-04-04** Returned to House with Amendments
- **2019-04-09** Scheduled for 2nd Reading
- **2019-04-09** 2nd Reading Senate Amendments Concurred `amendment-passage, amendment-amendment, reading-2`
- **2019-04-10** Scheduled for 3rd Reading
- **2019-04-10** 3rd Reading Passed as Amended by Senate `passage, reading-3`
- **2019-04-10** Sent to Enrolling
- **2019-04-13** Returned from Enrolling
- **2019-04-13** Printed - Enrolled Version Available
- **2019-04-26** Signed by Speaker
- **2019-04-30** Signed by President
- **2019-05-01** Transmitted to Governor `executive-receipt`
- **2019-05-10** 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/271990af-2fe9-4d47-901c-031fd20c1f06`. Confidence: reported (aggregated from official Montana legislature records).