---
type: "Bill"
title: "Protect critical infrastructure"
description: "Protect critical infrastructure"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2021"
identifier: "HB 481"
citation: "Montana HB 481 (2021)"
classification: ["bill"]
subjects: ["Civil Procedure", "Crimes", "Environmental Protection", "Mining and Minerals (see also: Oil and Gas)", "Oil and Gas (see also: Mining and Minerals; Taxation--Oil and Gas)"]
status: "enacted"
primary_sponsors: ["Steve Gunderson"]
version_count: 5
action_count: 59
vote_count: 8
first_action: "2020-12-02"
last_action: "2021-05-14"
source: "openstates"
source_identifier: "ocd-bill/cc48fc2b-4994-44fd-86b4-d4bad0fe5043"
source_url: "http://laws.leg.mt.gov/legprd/LAW0210W$BSIV.ActionQuery?P_BILL_NO1=481&P_BLTP_BILL_TYP_CD=HB&Z_ACTION=Find&P_SESS=20211"
source_hash: "9c013e00d708e4928660a8a70f58a496a3f5bbc0b76ab2622da7f029222d97ce"
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 481 (2021) — Protect critical infrastructure

## Version chain

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

1. **HB0481_1.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0499//HB0481_1.pdf)
2. **HB0481_2.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0499//HB0481_2.pdf)
3. **HB0481_3.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0499//HB0481_3.pdf)
4. **HB0481_X.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0499//HB0481_X.pdf)
5. **Enrolled** (enrolled) — [source](https://leg.mt.gov/bills/2021/billpdf/HB0481.pdf)

## Votes

- DO PASS AS AMENDED — **12–7** (pass) · lower
- Do Concur — **31–19** (pass) · upper
- Do Concur — **31–19** (pass) · upper
- Do Pass — **65–34** (pass) · lower
- BE CONCURRED IN AS AMENDED — **7–4** (pass) · upper
- Do Pass — **67–33** (pass) · lower
- Do Concur — **68–32** (pass) · lower
- Do Concur — **65–33** (pass) · lower

## Sponsors

- Steve Gunderson — primary (person)

## Timeline

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

- **2020-12-02** Draft Request Received
- **2021-01-15** Draft to Requester for Review
- **2021-01-17** Draft to Requester for Review
- **2021-01-18** Draft to Requester for Review
- **2021-01-19** Draft to Requester for Review
- **2021-01-22** Draft to Requester for Review
- **2021-01-24** Draft to Drafter - Edit Review
- **2021-01-24** Draft in Legal Review
- **2021-01-28** Draft Back for Redo
- **2021-01-28** Draft to Requester for Review
- **2021-02-02** Draft to Requester for Review
- **2021-02-06** Draft to Requester for Review
- **2021-02-06** Draft in Legal Review
- **2021-02-08** Draft in Edit
- **2021-02-09** Draft to Drafter - Edit Review
- **2021-02-09** Draft in Input/Proofing
- **2021-02-15** Draft in Final Drafter Review
- **2021-02-15** Bill Draft Text Available Electronically
- **2021-02-17** Draft Ready for Delivery
- **2021-02-17** Executive Director Final Review
- **2021-02-18** Draft Ready for Delivery
- **2021-02-18** Draft Delivered to Requester
- **2021-02-18** Introduced `introduction`
- **2021-02-18** Referred to Committee - (H) Judiciary `referral-committee`
- **2021-02-18** First Reading `reading-1`
- **2021-02-18** Introduced Bill Text Available Electronically
- **2021-02-23** Amendments Available
- **2021-02-24** Hearing - (H) Judiciary
- **2021-02-26** Committee Executive Action--Bill Passed as Amended - (H) Judiciary `committee-passage`
- **2021-02-27** Printed - New Version Available
- **2021-02-27** Committee Report--Bill Passed as Amended - (H) Judiciary `committee-passage`
- **2021-03-01** Scheduled for 2nd Reading
- **2021-03-01** 2nd Reading Passed `reading-2`
- **2021-03-02** Scheduled for 3rd Reading
- **2021-03-02** 3rd Reading Passed `passage, reading-3`
- **2021-03-02** Transmitted to Senate
- **2021-03-08** First Reading `reading-1`
- **2021-03-08** Referred to Committee - (S) Judiciary `referral-committee`
- **2021-04-01** Hearing - (S) Judiciary
- **2021-04-09** Committee Executive Action--Bill Concurred as Amended - (S) Judiciary
- **2021-04-12** Committee Report--Bill Concurred as Amended - (S) Judiciary
- **2021-04-12** Printed - New Version Available
- **2021-04-14** Scheduled for 2nd Reading
- **2021-04-14** 2nd Reading Concurred `reading-2`
- **2021-04-15** Scheduled for 3rd Reading
- **2021-04-15** 3rd Reading Concurred `passage, reading-3`
- **2021-04-15** Returned to House with Amendments
- **2021-04-23** Scheduled for 2nd Reading
- **2021-04-23** 2nd Reading Senate Amendments Concurred `amendment-amendment, amendment-passage, reading-2`
- **2021-04-26** Scheduled for 3rd Reading
- **2021-04-26** 3rd Reading Passed as Amended by Senate `passage, reading-3`
- **2021-04-26** Sent to Enrolling
- **2021-05-01** Returned from Enrolling
- **2021-05-01** Printed - Enrolled Version Available
- **2021-05-04** Signed by Speaker
- **2021-05-04** Signed by President
- **2021-05-04** Transmitted to Governor `executive-receipt`
- **2021-05-14** Signed by Governor `executive-signature`
- **2021-05-14** 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/cc48fc2b-4994-44fd-86b4-d4bad0fe5043`. Confidence: reported (aggregated from official Montana legislature records).