---
type: "Bill"
title: "Revise school immunization laws"
description: "Revise school immunization laws"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2023"
identifier: "HB 715"
citation: "Montana HB 715 (2023)"
classification: ["bill"]
subjects: ["Health (see also: Health Care Services; Safety)", "Schools and Education"]
status: "enacted"
primary_sponsors: ["Jennifer Carlson"]
version_count: 5
action_count: 44
vote_count: 6
first_action: "2022-11-13T22:44:19+00:00"
last_action: "2023-05-19T17:15:31+00:00"
source: "openstates"
source_identifier: "ocd-bill/f72fb778-011d-423e-a708-65dd3ace46a5"
source_url: "https://bills.legmt.gov/#/bill/20231/LC1117"
source_hash: "383422cb797462b6a9577704d6f0168e6ab1f28ece780b69b00939d865c31800"
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 715 (2023) — Revise school immunization laws

## Version chain

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

1. **HB0715.001.005_combo_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=10529)
2. **HB0715.001.005_combo_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=10530)
3. **HB0715_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=10532)
4. **HB0715_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=10533)
5. **HB0715_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=10531)

## Votes

- (S) Committee Executive Action--Bill Concurred — **6–3** (pass) · upper
- (H) 3rd Reading Passed — **64–33** (pass) · lower
- (H) Committee Executive Action--Bill Passed as Amended — **13–8** (pass) · lower
- (H) 2nd Reading Passed — **65–35** (pass) · lower
- (S) 2nd Reading Concurred — **29–21** (pass) · upper
- (S) 3rd Reading Concurred — **30–20** (pass) · upper

## Sponsors

- Jennifer Carlson — primary (person)

## Timeline

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

- **2023-05-19T17:15:31+00:00** Chapter Number Assigned `became-law`
- **2023-05-18T23:35:59+00:00** (H) Signed by Governor `executive-signature`
- **2023-05-08T16:20:00+00:00** (H) Transmitted to Governor `executive-receipt`
- **2023-05-04T18:00:00+00:00** (S) Signed by President `passage`
- **2023-04-29T20:00:00+00:00** (H) Signed by Speaker `passage`
- **2023-04-23T19:17:50+00:00** (C) Printed - Enrolled Version Available `enrolled`
- **2023-04-23T19:17:49+00:00** (H) Returned from Enrolling
- **2023-04-20T15:22:43+00:00** (H) Sent to Enrolling
- **2023-04-19T02:44:00+00:00** (S) Returned to House
- **2023-04-18T22:12:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2023-04-18T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2023-04-17T20:10:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2023-04-17T16:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-04-11T19:22:00+00:00** (S) Committee Report--Bill Concurred
- **2023-04-07T20:00:00+00:00** (S) Committee Executive Action--Bill Concurred
- **2023-04-05T21:00:00+00:00** (S) Hearing
- **2023-03-13T19:49:34+00:00** (S) Referred to Committee `referral-committee`
- **2023-03-10T00:13:27+00:00** (S) First Reading `reading-1`
- **2023-03-03T21:35:21+00:00** (H) Transmitted to Senate
- **2023-03-03T17:07:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2023-03-03T16:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2023-03-03T03:16:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2023-03-02T20:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2023-03-02T01:59:00+00:00** (H) Committee Report--Bill Passed as Amended `committee-passage`
- **2023-03-01T17:50:10+00:00** (C) Printed - New Version Available
- **2023-02-28T22:00:00+00:00** (H) Committee Executive Action--Bill Passed as Amended `committee-passage`
- **2023-02-27T22:00:32+00:00** (H) Hearing
- **2023-02-21T20:42:41+00:00** (H) First Reading `reading-1`
- **2023-02-21T18:51:04+00:00** (H) Referred to Committee `referral-committee`
- **2023-02-21T17:10:55+00:00** (C) Introduced Bill Text Available Electronically
- **2023-02-21T16:44:18+00:00** (H) Introduced
- **2023-02-20T16:46:09+00:00** (C) Draft Delivered to Requester
- **2023-02-18T22:40:14+00:00** (C) Draft Ready for Delivery
- **2023-02-18T18:14:00+00:00** (C) Executive Director Final Review
- **2023-02-18T18:13:55+00:00** (C) Draft Ready for Delivery
- **2023-02-18T15:18:48+00:00** (C) Draft in Assembly
- **2023-02-17T23:52:15+00:00** (C) Executive Director Review
- **2023-02-17T23:42:46+00:00** (C) Bill Draft Text Available Electronically
- **2023-02-17T23:42:45+00:00** (C) Draft in Final Drafter Review
- **2023-02-17T21:46:33+00:00** (C) Draft in Input/Proofing
- **2023-02-17T20:31:14+00:00** (C) Draft to Drafter - Edit Review
- **2023-02-15T23:47:13+00:00** (C) Draft in Edit
- **2023-02-14T16:58:13+00:00** (C) Draft in Legal Review
- **2022-11-13T22:44:19+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/f72fb778-011d-423e-a708-65dd3ace46a5`. Confidence: reported (aggregated from official Montana legislature records).