---
type: "Bill"
title: "Requiring mandatory AIS decontamination of certain vessels with ballast/bladders"
description: "Requiring mandatory AIS decontamination of certain vessels with ballast/bladders"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2019"
identifier: "HB 608"
citation: "Montana HB 608 (2019)"
classification: ["bill"]
subjects: ["Environmental Protection", "Fish and Wildlife", "Indians", "Revenue", "State"]
status: "enacted"
primary_sponsors: ["Joe Read"]
version_count: 4
action_count: 60
vote_count: 7
first_action: "2019-01-11"
last_action: "2019-05-20"
source: "openstates"
source_identifier: "ocd-bill/fe07fc1a-bc13-4605-b1f8-1da5e55570fc"
source_url: "http://laws.leg.mt.gov/legprd/LAW0210W$BSIV.ActionQuery?P_BILL_NO1=608&P_BLTP_BILL_TYP_CD=HB&Z_ACTION=Find&P_SESS=20191"
source_hash: "c5cd584ac3c8c4a9e9f31929c0f1b4a33f03ffb6968404b1599f91ee4a01291a"
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 608 (2019) — Requiring mandatory AIS decontamination of certain vessels with ballast/bladders

## Version chain

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

1. **HB0608_1.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0699//HB0608_1.pdf)
2. **HB0608_2.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0699//HB0608_2.pdf)
3. **HB0608_x.pdf** (committee substitute) — [source](https://leg.mt.gov/bills/2019/HB0699//HB0608_x.pdf)
4. **Enrolled** (enrolled) — [source](http://leg.mt.gov/bills/2019/billpdf/HB0608.pdf)

## Votes

- Do Pass — **63–35** (pass) · lower
- DO PASS AS AMENDED — **8–7** (pass) · lower
- Do Pass — **66–34** (pass) · lower
- Do Concur — **50–0** (pass) · upper
- DO PASS — **18–4** (pass) · lower
- BE CONCURRED IN — **12–0** (pass) · upper
- Do Concur — **48–2** (pass) · upper

## Sponsors

- Joe Read — primary (person)

## Timeline

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

- **2019-01-11** Draft Request Received
- **2019-01-31** Draft to Requester for Review
- **2019-02-04** Draft On Hold
- **2019-02-07** Draft Back for Requester Changes
- **2019-02-07** Draft to Requester for Review
- **2019-02-11** Draft to Requester for Review
- **2019-02-11** Draft in Legal Review
- **2019-02-11** Draft in Edit
- **2019-02-18** Draft to Drafter - Edit Review [KWK]
- **2019-02-19** Draft in Input/Proofing
- **2019-02-19** Draft in Final Drafter Review
- **2019-02-19** Bill Draft Text Available Electronically
- **2019-02-19** Executive Director Review
- **2019-02-19** Draft in Assembly
- **2019-02-19** Executive Director Final Review
- **2019-02-19** Draft Ready for Delivery
- **2019-02-20** Draft Delivered to Requester
- **2019-02-22** Fiscal Note Requested
- **2019-02-22** Introduced `introduction`
- **2019-02-22** Referred to Committee `referral-committee`
- **2019-02-22** First Reading `reading-1`
- **2019-02-22** Introduced Bill Text Available Electronically
- **2019-02-27** Fiscal Note Received
- **2019-02-27** Fiscal Note Signed
- **2019-02-28** Fiscal Note Printed
- **2019-03-11** Hearing
- **2019-03-13** Committee Executive Action--Bill Passed as Amended `committee-passage`
- **2019-03-14** Printed - New Version Available
- **2019-03-14** Committee Report--Bill Passed as Amended `committee-passage`
- **2019-03-16** Scheduled for 2nd Reading
- **2019-03-16** 2nd Reading Passed `reading-2`
- **2019-03-16** Rereferred to Committee `referral-committee`
- **2019-03-19** Revised Fiscal Note Requested
- **2019-03-20** Revised Fiscal Note Received
- **2019-03-20** Revised Fiscal Note Signed
- **2019-03-20** Revised Fiscal Note Printed
- **2019-03-22** Hearing
- **2019-03-22** Committee Executive Action--Bill Passed `committee-passage`
- **2019-03-22** Committee Report--Bill Passed `committee-passage`
- **2019-03-25** Scheduled for 3rd Reading
- **2019-03-25** 3rd Reading Passed `passage, reading-3`
- **2019-03-25** Transmitted to Senate
- **2019-03-26** First Reading `reading-1`
- **2019-03-26** Referred to Committee `referral-committee`
- **2019-04-08** Hearing
- **2019-04-08** Committee Executive Action--Bill Concurred
- **2019-04-09** Committee Report--Bill Concurred
- **2019-04-16** Scheduled for 2nd Reading
- **2019-04-16** 2nd Reading Concurred `reading-2`
- **2019-04-17** Scheduled for 3rd Reading
- **2019-04-17** 3rd Reading Concurred `passage, reading-3`
- **2019-04-17** Returned to House
- **2019-04-17** Sent to Enrolling
- **2019-04-18** Returned from Enrolling
- **2019-04-18** Printed - Enrolled Version Available
- **2019-04-26** Signed by Speaker
- **2019-04-30** Signed by President
- **2019-05-01** Transmitted to Governor `executive-receipt`
- **2019-05-10** Signed by Governor `executive-signature`
- **2019-05-20** Chapter Number Assigned

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/fe07fc1a-bc13-4605-b1f8-1da5e55570fc`. Confidence: reported (aggregated from official Montana legislature records).