---
type: "Bill"
title: "A bill for an act prohibiting open containers of beverages containing tetrahydrocannabinol in the passenger area of motor vehicles on highways, and making penalties applicable."
description: "A bill for an act prohibiting open containers of beverages containing tetrahydrocannabinol in the passenger area of motor vehicles on highways, and making penalties applicable."
jurisdiction: "us/states/ia"
legislature: "Iowa General Assembly"
session: "2025-2026"
identifier: "HF 181"
citation: "Iowa HF 181 (2025-2026)"
classification: ["bill"]
subjects: ["driving", "highways", "marijuana", "passengers", "vehicles"]
status: "enacted"
primary_sponsors: []
version_count: 4
action_count: 12
vote_count: 2
first_action: "2025-01-30"
last_action: "2025-03-28"
source: "openstates"
source_identifier: "ocd-bill/06a8ed59-a122-4bf6-b210-3f31efbfe3b8"
source_url: "https://www.legis.iowa.gov/legislation/billTracking/billHistory?billName=HF 181&ga=91"
source_hash: "b1bb15ecbe032044540acfd22a01eff2142da1d38d02e4d0220b3434d145613c"
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-ia"]
---

# Iowa HF 181 (2025-2026) — A bill for an act prohibiting open containers of beverages containing tetrahydrocannabinol in the passenger area of motor vehicles on highways, and making penalties applicable.

## Version chain

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

1. **Introduced** (filed) — [source](https://www.legis.iowa.gov/docs/publications/LGI/91/attachments/HF181.html)
2. **Enrolled with Governor's Action** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGEG/91/attachments/HF181.html)
3. **Signed Enrolled Bill (PDF)** (committee substitute) — [source](https://www.legis.iowa.gov/docs/publications/LGE/91/Attachments/HF181_GovLetter.pdf)
4. **Enrolled** (enrolled) — [source](https://www.legis.iowa.gov/docs/publications/LGE/91/attachments/HF181.html)

## Votes

- Shall the bill pass? — **48–0** (pass) · upper
- Shall the bill pass? — **86–1** (pass) · lower

## Sponsors

- COMMITTEE ON PUBLIC SAFETY — primary (organization)

## Timeline

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

- **2025-01-30** Introduced, placed on calendar. `introduction`
- **2025-03-10** Passed House, yeas 86, nays 1. `passage`
- **2025-03-18** Explanation of vote.
- **2025-03-10** Immediate message.
- **2025-03-10** Message from House.
- **2025-03-10** Read first time, attached to SF 392. `reading-1`
- **2025-03-12** Substituted for SF 392.
- **2025-03-12** Passed Senate, yeas 48, nays 0. `passage`
- **2025-03-12** Immediate message.
- **2025-03-12** Message from Senate.
- **2025-03-28** Reported correctly enrolled, signed by Speaker and President, and sent to Governor.
- **2025-03-28** Signed by Governor. `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/06a8ed59-a122-4bf6-b210-3f31efbfe3b8`. Confidence: reported (aggregated from official Iowa legislature records).