---
type: "Bill"
title: "Generally revise privacy laws related to biometric data"
description: "Generally revise privacy laws related to biometric data"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2023"
identifier: "SB 351"
citation: "Montana SB 351 (2023)"
classification: ["bill"]
subjects: ["Consumer Protection", "Privacy"]
status: "enacted"
primary_sponsors: ["Daniel Zolnikov"]
version_count: 17
action_count: 67
vote_count: 11
first_action: "2022-11-13T18:08:00+00:00"
last_action: "2023-06-07T18:45:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/940b6060-e2f7-40f4-9956-9cb4d13ceaa2"
source_url: "https://bills.legmt.gov/#/bill/20231/LC1085"
source_hash: "e9be4fc4aade732070cc45fab8de42533e1ca2db2d91ab12926e70959756739a"
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 SB 351 (2023) — Generally revise privacy laws related to biometric data

## Version chain

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

1. **SB0351.001.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7533)
2. **SB0351.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7535)
3. **SB0351.002.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7530)
4. **SB0351.002.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7532)
5. **SB0351.003.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7536)
6. **SB0351.003.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7531)
7. **SB0351.003.004(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=12200)
8. **SB0351.003.004.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=10410)
9. **SB0351.003.004_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7537)
10. **SB0351.003.004_combo_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7538)
11. **SB0351.003.004_combo_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7534)
12. **SB0351001SCS15248.slc.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7523)
13. **SB0351_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7503)
14. **SB0351_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7502)
15. **SB0351_3.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7499)
16. **SB0351_4.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7500)
17. **SB0351_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=7501)

## Votes

- (S) Committee Executive Action--Bill Passed as Amended — **10–0** (pass) · upper
- (S) 3rd Reading Free Conference Committee Report Adopted — **49–1** (pass) · upper
- (S) 2nd Reading House Amendments Not Concurred — **49–1** (pass) · upper
- (S) 2nd Reading Passed — **49–0** (pass) · upper
- (H) 3rd Reading Concurred — **97–0** (pass) · lower
- (H) 2nd Reading Free Conference Committee Report Adopted — **96–2** (pass) · lower
- (H) Committee Executive Action--Bill Concurred as Amended — **13–0** (pass) · lower
- (H) 3rd Reading Free Conference Committee Report Adopted — **93–3** (pass) · lower
- (H) 2nd Reading Concurred — **100–0** (pass) · lower
- (S) 3rd Reading Passed — **50–0** (pass) · upper
- (S) 2nd Reading Free Conference Committee Report Adopted — **50–0** (pass) · upper

## Sponsors

- Daniel Zolnikov — primary (person)

## Timeline

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

- **2023-06-07T18:45:00+00:00** Chapter Number Assigned `became-law`
- **2023-06-07T17:03:00+00:00** (S) Signed by Governor `executive-signature`
- **2023-05-30T14:00:00+00:00** (S) Transmitted to Governor `executive-receipt`
- **2023-05-27T17:10:00+00:00** (H) Signed by Speaker `passage`
- **2023-05-23T16:00:00+00:00** (S) Signed by President `passage`
- **2023-05-16T17:02:41+00:00** (C) Printed - Enrolled Version Available `enrolled`
- **2023-05-16T17:02:40+00:00** (S) Returned from Enrolling
- **2023-05-16T15:11:12+00:00** (S) Sent to Enrolling
- **2023-05-03T02:38:00+00:00** (H) 3rd Reading Free Conference Committee Report Adopted
- **2023-05-03T00:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2023-05-02T21:26:00+00:00** (S) 3rd Reading Free Conference Committee Report Adopted
- **2023-05-02T20:25:00+00:00** (S) 2nd Reading Free Conference Committee Report Adopted `reading-2`
- **2023-05-02T20:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-05-02T19:41:00+00:00** (H) 2nd Reading Free Conference Committee Report Adopted `reading-2`
- **2023-05-02T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2023-05-01T16:08:00+00:00** (H) Free Conference Committee Report Received `receipt`
- **2023-05-01T16:00:00+00:00** (S) Free Conference Committee Report Received `receipt`
- **2023-05-01T14:23:00+00:00** (S) Hearing
- **2023-04-26T19:31:00+00:00** (H) Free Conference Committee Appointed
- **2023-04-24T23:47:00+00:00** (S) Free Conference Committee Appointed
- **2023-04-24T23:46:00+00:00** (S) Conference Committee Dissolved
- **2023-04-21T21:19:00+00:00** (S) Conference Committee Appointed
- **2023-04-20T20:15:00+00:00** (S) 2nd Reading House Amendments Not Concurred `amendment-failure, reading-2`
- **2023-04-20T20:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-04-18T14:31:44+00:00** (H) Returned to Senate with Amendments
- **2023-04-18T00:57:00+00:00** (H) 3rd Reading Concurred `passage, reading-3`
- **2023-04-14T21:02:00+00:00** (H) 2nd Reading Concurred `reading-2, reading-2`
- **2023-04-13T19:27:00+00:00** (H) Committee Report--Bill Concurred as Amended
- **2023-04-13T16:25:31+00:00** (C) Printed - New Version Available
- **2023-04-07T21:00:00+00:00** (H) Committee Executive Action--Bill Concurred as Amended
- **2023-04-05T21:00:00+00:00** (H) Hearing
- **2023-03-15T21:45:22+00:00** (H) First Reading `reading-1`
- **2023-03-15T21:02:34+00:00** (H) Referred to Committee `referral-committee`
- **2023-03-03T18:17:55+00:00** (S) Transmitted to House
- **2023-03-02T15:52:00+00:00** (S) 3rd Reading Passed `passage, reading-3`
- **2023-03-02T15:00:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2023-03-01T17:13:00+00:00** (S) 2nd Reading Passed `reading-2, reading-2`
- **2023-03-01T17:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2023-02-25T23:05:49+00:00** (C) Printed - New Version Available
- **2023-02-25T00:01:00+00:00** (S) Committee Report--Bill Passed as Amended `committee-passage`
- **2023-02-24T15:00:00+00:00** (S) Committee Executive Action--Bill Passed as Amended `committee-passage`
- **2023-02-24T14:55:00+00:00** (S) Hearing
- **2023-02-24T02:07:25+00:00** (C) Amendments Available
- **2023-02-15T20:18:00+00:00** (S) First Reading `reading-1`
- **2023-02-15T19:36:26+00:00** (S) Referred to Committee `referral-committee`
- **2023-02-15T16:04:19+00:00** (C) Introduced Bill Text Available Electronically
- **2023-02-15T15:56:49+00:00** (S) Introduced
- **2023-02-15T15:44:33+00:00** (C) Draft Delivered to Requester
- **2023-02-14T20:33:08+00:00** (C) Draft Ready for Delivery
- **2023-02-14T19:33:13+00:00** (C) Executive Director Final Review
- **2023-02-14T19:33:09+00:00** (C) Draft Ready for Delivery
- **2023-02-14T19:27:06+00:00** (C) Executive Director Review
- **2023-01-30T16:34:59+00:00** (C) Executive Director Final Review
- **2023-01-30T15:03:52+00:00** (C) Executive Director Review
- **2023-01-29T20:54:42+00:00** (C) Bill Draft Text Available Electronically
- **2023-01-29T20:54:41+00:00** (C) Draft in Final Drafter Review
- **2023-01-28T19:45:30+00:00** (C) Draft in Input/Proofing
- **2023-01-25T19:21:35+00:00** (C) Draft to Drafter - Edit Review
- **2023-01-18T21:35:58+00:00** (C) Draft in Edit
- **2023-01-18T21:11:53+00:00** (C) Draft in Legal Review
- **2023-01-18T19:41:07+00:00** (C) Draft to Requester for Review
- **2023-01-18T03:12:25+00:00** (C) Draft to Requester for Review
- **2023-01-13T21:07:43+00:00** (C) Draft to Requester for Review
- **2023-01-03T14:33:09+00:00** (C) Draft to Requester for Review
- **2023-01-02T16:43:59+00:00** (C) Draft Taken Off Hold
- **2022-11-23T22:06:15+00:00** (C) Draft On Hold
- **2022-11-13T18:08:00+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/940b6060-e2f7-40f4-9956-9cb4d13ceaa2`. Confidence: reported (aggregated from official Montana legislature records).