---
type: "Bill"
title: "Revise laws to include renewable hydrogen"
description: "Revise laws to include renewable hydrogen"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2021"
identifier: "HB 170"
citation: "Montana HB 170 (2021)"
classification: ["bill"]
subjects: ["Energy", "Revenue", "State", "Rule Making"]
status: "enacted"
primary_sponsors: ["Tom Welch"]
version_count: 4
action_count: 50
vote_count: 6
first_action: "2020-11-08"
last_action: "2021-04-29"
source: "openstates"
source_identifier: "ocd-bill/4939fc8d-3e13-4c07-abac-ec80f2a15b78"
source_url: "http://laws.leg.mt.gov/legprd/LAW0210W$BSIV.ActionQuery?P_BILL_NO1=170&P_BLTP_BILL_TYP_CD=HB&Z_ACTION=Find&P_SESS=20211"
source_hash: "05875ec1838b3f19c8567b652c78b90751492f50068e283d249d0588befedcfe"
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 170 (2021) — Revise laws to include renewable hydrogen

## Version chain

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

1. **HB0170_1.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0199//HB0170_1.pdf)
2. **HB0170_2.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0199//HB0170_2.pdf)
3. **HB0170_X.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2021/HB0199//HB0170_X.pdf)
4. **Enrolled** (enrolled) — [source](https://leg.mt.gov/bills/2021/billpdf/HB0170.pdf)

## Votes

- Do Concur — **48–2** (pass) · upper
- Do Pass — **84–15** (pass) · lower
- Do Pass — **89–11** (pass) · lower
- Do Concur — **47–3** (pass) · upper
- DO PASS AS AMENDED — **16–2** (pass) · lower
- BE CONCURRED IN — **12–1** (pass) · upper

## Sponsors

- Tom Welch — primary (person)

## Timeline

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

- **2020-11-08** Draft Request Received
- **2020-11-20** Draft to Requester for Review
- **2020-12-30** Draft in Legal Review
- **2021-01-02** Draft in Edit
- **2021-01-05** Draft to Drafter - Edit Review
- **2021-01-05** Draft in Input/Proofing
- **2021-01-05** Draft in Final Drafter Review
- **2021-01-05** Bill Draft Text Available Electronically
- **2021-01-06** Executive Director Review
- **2021-01-06** Draft in Assembly
- **2021-01-06** Draft Ready for Delivery
- **2021-01-06** Executive Director Final Review
- **2021-01-06** Draft Ready for Delivery
- **2021-01-13** Draft Delivered to Requester
- **2021-01-15** Introduced `introduction`
- **2021-01-15** Fiscal Note Requested
- **2021-01-15** Introduced Bill Text Available Electronically
- **2021-01-15** Referred to Committee - (H) Taxation `referral-committee`
- **2021-01-15** First Reading `reading-1`
- **2021-01-21** Fiscal Note Received
- **2021-01-22** Fiscal Note Signed
- **2021-01-22** Fiscal Note Printed
- **2021-01-26** Hearing - (H) Taxation
- **2021-02-08** Amendments Available
- **2021-02-18** Committee Executive Action--Bill Passed as Amended - (H) Taxation `committee-passage`
- **2021-02-18** Committee Report--Bill Passed as Amended - (H) Taxation `committee-passage`
- **2021-02-18** Printed - New Version Available
- **2021-03-11** Scheduled for 2nd Reading
- **2021-03-11** 2nd Reading Passed `reading-2`
- **2021-03-12** Scheduled for 3rd Reading
- **2021-03-12** 3rd Reading Passed `passage, reading-3`
- **2021-03-12** Transmitted to Senate
- **2021-03-15** First Reading `reading-1`
- **2021-03-15** Referred to Committee - (S) Energy and Telecommunications `referral-committee`
- **2021-03-23** Hearing - (S) Energy and Telecommunications
- **2021-03-30** Committee Executive Action--Bill Concurred - (S) Energy and Telecommunications
- **2021-03-31** Committee Report--Bill Concurred - (S) Energy and Telecommunications
- **2021-04-06** Scheduled for 2nd Reading
- **2021-04-06** 2nd Reading Concurred `reading-2`
- **2021-04-07** Scheduled for 3rd Reading
- **2021-04-07** 3rd Reading Concurred `passage, reading-3`
- **2021-04-07** Returned to House
- **2021-04-08** Sent to Enrolling
- **2021-04-14** Returned from Enrolling
- **2021-04-14** Printed - Enrolled Version Available
- **2021-04-20** Signed by Speaker
- **2021-04-21** Signed by President
- **2021-04-22** Transmitted to Governor `executive-receipt`
- **2021-04-28** Signed by Governor `executive-signature`
- **2021-04-29** 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/4939fc8d-3e13-4c07-abac-ec80f2a15b78`. Confidence: reported (aggregated from official Montana legislature records).