---
type: "Bill"
title: "Revise 911 emergency telephone system laws"
description: "Revise 911 emergency telephone system laws"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "HB 538"
citation: "Montana HB 538 (2025)"
classification: ["bill"]
subjects: ["Communications", "Emergency Services"]
status: "enacted"
primary_sponsors: ["Melissa Nikolakakos"]
version_count: 20
action_count: 45
vote_count: 6
first_action: "2024-12-31T19:47:19+00:00"
last_action: "2025-05-08T19:06:45+00:00"
source: "openstates"
source_identifier: "ocd-bill/3aee6dbe-5397-4e68-a4b2-24169663cf53"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC4219?open_tab=sum"
source_hash: "4f8db825ec65f255886f39786618f7e7990d28410ed8f45506b265b3e376febb"
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 538 (2025) — Revise 911 emergency telephone system laws

## Version chain

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

1. **HB0538_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284364)
2. **HB0538_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=291819)
3. **HB0538_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301886)
4. **HB0538_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=311675)
5. **HB0538_1(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=311679)
6. **HB0538_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=283640)
7. **HB0538_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=311684)
8. **HB0538_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=322151)
9. **HB0538_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324822)
10. **HB0538_X(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=327114)
11. **HB0538_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=311685)
12. **HB0538_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312330)
13. **HB0538_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312331)
14. **HB0538_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312332)
15. **HB0538_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317078)
16. **HB0538_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320644)
17. **HB0538_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=322149)
18. **HB0538_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=322150)
19. **HB0538_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=311681)
20. **LC4219.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=279799)

## Votes

- do_pass — **14–0** (pass) · lower
- Do Concur — **50–0** (pass) · upper
- Do Pass — **97–0** (pass) · lower
- Do Concur — **49–0** (pass) · upper
- Do Pass — **99–1** (pass) · lower
- be_concurred_in — **9–0** (pass) · upper

## Sponsors

- Melissa Nikolakakos — primary (person)

## Timeline

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

- **2024-12-31T19:47:19+00:00** (LC) Drafter Assigned
- **2024-12-31T19:47:20+00:00** (LC) Draft On Hold
- **2025-01-07T17:35:19+00:00** (LC) Draft Taken Off Hold
- **2025-02-03T21:18:02+00:00** (LC) Draft in Legal Review
- **2025-02-04T21:58:48+00:00** (LC) Draft in Edit
- **2025-02-06T18:42:56+00:00** (LC) Draft in Input/Proofing
- **2025-02-07T17:18:37+00:00** (LC) Draft in Final Drafter Review
- **2025-02-08T22:56:01+00:00** (LC) Drafter Assigned
- **2025-02-08T23:20:27+00:00** (LC) Draft in Edit
- **2025-02-09T19:30:20+00:00** (LC) Draft in Input/Proofing
- **2025-02-10T17:10:33+00:00** (LC) Draft in Final Drafter Review
- **2025-02-10T23:11:22+00:00** (LC) Draft in Assembly
- **2025-02-11T15:40:23+00:00** (LC) Draft Ready for Delivery
- **2025-02-17T17:39:02+00:00** (LC) Draft Delivered to Requester
- **2025-02-18T19:10:51+00:00** (H) Introduced
- **2025-02-18T19:16:25+00:00** (H) Fiscal Note Requested
- **2025-02-19T19:34:06+00:00** (H) Referred to Committee - (H) Energy, Technology and Federal Relations `referral-committee`
- **2025-02-19T19:52:09+00:00** (H) First Reading `reading-1`
- **2025-02-20T00:02:52+00:00** (H) Hearing - (H) Energy, Technology and Federal Relations
- **2025-02-21T23:48:52+00:00** (H) Committee Executive Action--Bill Passed - (H) Energy, Technology and Federal Relations `committee-passage`
- **2025-02-25T22:00:52+00:00** (H) Fiscal Note Received `receipt`
- **2025-02-26T15:47:29+00:00** (H) Fiscal Note Signed
- **2025-02-26T16:25:00+00:00** (H) Fiscal Note Printed
- **2025-02-26T20:23:00+00:00** (H) Committee Report--Bill Passed - (H) Energy, Technology and Federal Relations `committee-passage`
- **2025-03-01T20:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-03-01T21:54:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2025-03-03T20:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-03-03T22:03:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2025-03-03T23:19:20+00:00** (H) Transmitted to Senate
- **2025-03-04T20:30:09+00:00** (S) First Reading `reading-1`
- **2025-03-05T00:55:17+00:00** (S) Referred to Committee - (S) State Administration `referral-committee`
- **2025-03-12T14:44:15+00:00** (S) Hearing - (S) State Administration
- **2025-03-31T23:02:43+00:00** (S) Committee Executive Action--Bill Concurred - (S) State Administration
- **2025-04-01T19:19:00+00:00** (S) Committee Report--Bill Concurred - (S) State Administration
- **2025-04-14T16:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-04-14T16:45:00+00:00** (S) 2nd Reading Concurred `reading-2, reading-2`
- **2025-04-15T19:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-04-15T21:08:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2025-04-15T21:10:12+00:00** (H) Sent to Enrolling
- **2025-04-17T13:25:33+00:00** (H) Returned from Enrolling
- **2025-04-24T23:00:29+00:00** (H) Signed by Speaker `passage`
- **2025-04-25T18:15:35+00:00** (S) Signed by President `passage`
- **2025-04-25T21:33:14+00:00** (H) Transmitted to Governor `executive-receipt`
- **2025-05-05T18:37:31+00:00** (H) Signed by Governor `executive-signature`
- **2025-05-08T19:06:45+00:00** Chapter Number Assigned `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/3aee6dbe-5397-4e68-a4b2-24169663cf53`. Confidence: reported (aggregated from official Montana legislature records).