# Montana SB 390: Revise definitions in Clean Indoor Air Act

Montana SB 390, Revise definitions in Clean Indoor Air Act, is a 69th Legislature, Regular Session (2025) Senate bill sponsored by Willis Curdy (Democrat); status signed, last action 2025-05-13 (Chapter Number Assigned) (as of 2026-10-19).

- Canonical: https://policyrisk.com/state-bill/MT-SB390-2025
- As of: 2026-10-19
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Bill: Montana SB 390
- State: Montana
- Session: 69th Legislature, Regular Session (2025)
- Title: Revise definitions in Clean Indoor Air Act
- Status: signed
- Chamber: Senate
- Introduced: 2025-02-20
- Last action: 2025-05-13, Chapter Number Assigned
- Sponsor: Willis Curdy (Democrat)
- Cosponsors: 1
- Subjects: Health, Buildings and Building Regulations
- Touches household money: no
- Roll calls: 6 (263 yes, 133 no in all)
- Economic provisions PRIA read: 2

## Summary

No summary available.

## Bill overview: provisions PRIA read

- Vaping and marijuana count as smoking: benefit, low. The law defines electronic smoking devices, including e-cigarettes, vape pens, and dab rigs. It also defines smoking to include vaping and marijuana use. Indoor smoking rules now cover these products in enclosed public places and workplaces, like restaurants, bars, offices, schools, and public tran…
- Bars and casinos need 60% from alcohol/gambling: mixed, medium. The law sets a clear test for the incidental exception. An establishment qualifies only if at least 60% of its annual gross income comes from alcohol sales or gambling receipts, or both. If you meet 60%, you can claim the exception; if you do not, you cannot. This affects taverns, nightclubs, cockt…

## Sponsors and cosponsors

- Sponsor: Willis Curdy (Democrat), Senate
- Cosponsor: Jonathan Windy Boy (Democrat), Senate

## Roll call votes

| Date | Chamber | Motion | Result | Yes | No | Other |
| --- | --- | --- | --- | --- | --- | --- |
| 2025-04-15 | Senate | Do Pass | pass | 34 | 16 |   |
| 2025-04-14 | Senate | Do Pass | pass | 31 | 19 |   |
| 2025-04-11 | House | Do Concur | pass | 59 | 39 |   |
| 2025-04-11 | House | Do Concur | pass | 64 | 35 |   |
| 2025-03-06 | Senate | Do Pass | pass | 37 | 12 |   |
| 2025-03-06 | Senate | Do Pass | pass | 38 | 12 |   |

## Actions (28)

- 2025-05-13: Chapter Number Assigned (Senate)
- 2025-05-08: Signed by Governor (Senate)
- 2025-05-01: Transmitted to Governor (Senate)
- 2025-05-01: Signed by Speaker (House)
- 2025-04-22: Signed by President (Senate)
- 2025-04-16: Returned from Enrolling (Senate)
- 2025-04-15: Sent to Enrolling (Senate)
- 2025-04-15: 3rd Reading House Amendments (Senate)
- 2025-04-14: 2nd Reading (Senate)
- 2025-04-11: Returned to Senate with Amendments (House)
- 2025-04-11: 3rd Reading (House)
- 2025-04-11: 2nd Reading (House)
- 2025-04-11: Committee Report (House)
- 2025-04-09: Committee Executive Action (House)
- 2025-04-09: Taken from Table in Committee (House)
- 2025-03-28: Tabled in Committee (House)
- 2025-03-19: Hearing (House)
- 2025-03-17: 1st Reading (House)
- 2025-03-17: Referred to Committee (House)
- 2025-03-07: Transmitted to House (Senate)
- 2025-03-06: 3rd Reading (Senate)
- 2025-03-06: 2nd Reading (Senate)
- 2025-03-01: Committee Report (Senate)
- 2025-02-28: Committee Executive Action (Senate)
- 2025-02-27: Hearing (Senate)
- 2025-02-21: Referred to Committee (Senate)
- 2025-02-21: 1st Reading (Senate)
- 2025-02-20: Introduced (Senate)

## Bill text

- Enrolled, 2025-04-15: [PDF](https://docs.legmt.gov/download-ticket?ticketId=95a90770-2696-456f-ba1e-edd309847aaa)
- As Amended (Version 2), 2025-04-11: [PDF](https://docs.legmt.gov/download-ticket?ticketId=ecb46c31-7006-48d1-b678-ced7bf495544)
- Introduced, 2025-02-20: [PDF](https://docs.legmt.gov/download-ticket?ticketId=41b6b30d-a3f5-4341-acbe-e17aed26f823)

## Related bills

- SB 437: Revise definition of sex in Montana law (signed)
- HB 831: Increase elderly homeowner and renter income tax credit (vetoed)
- HB 628: Revise early literacy targeted intervention laws (vetoed)
- SB 410: Provide for Montana genomic security act (vetoed)
- SB 424: Revising the disabled veteran property tax assistance program (vetoed)
- SB 422: Generally revise laws relating to insurance coverage relating to cancer (vetoed)

## Sources
- [Enrolled (PDF)](https://docs.legmt.gov/download-ticket?ticketId=95a90770-2696-456f-ba1e-edd309847aaa)
- [As Amended (Version 2) (PDF)](https://docs.legmt.gov/download-ticket?ticketId=ecb46c31-7006-48d1-b678-ced7bf495544)
- [Introduced (PDF)](https://docs.legmt.gov/download-ticket?ticketId=41b6b30d-a3f5-4341-acbe-e17aed26f823)

## Related
- [SB 437: Revise definition of sex in Montana law](https://policyrisk.com/state-bill/MT-SB437-2025)
- [HB 831: Increase elderly homeowner and renter income tax credit](https://policyrisk.com/state-bill/MT-HB831-2025)
- [HB 628: Revise early literacy targeted intervention laws](https://policyrisk.com/state-bill/MT-HB628-2025)
- [SB 410: Provide for Montana genomic security act](https://policyrisk.com/state-bill/MT-SB410-2025)
- [SB 424: Revising the disabled veteran property tax assistance program](https://policyrisk.com/state-bill/MT-SB424-2025)
- [SB 422: Generally revise laws relating to insurance coverage relating to cancer](https://policyrisk.com/state-bill/MT-SB422-2025)
- [Montana bills](https://policyrisk.com/states/montana/bills)
- [Montana state hub](https://policyrisk.com/states/montana)
- [All state legislation](https://policyrisk.com/state-bills)

Source: PRIA, https://policyrisk.com/state-bill/MT-SB390-2025 (as of 2026-10-19).