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MT HB178: Limit government use of AI systems

Effective Oct 1, 2025 Montana · 2025 session

Last verified Oct 12, 2026 · official bill text

HB178 · where it stands

All steps complete
  1. Introduced Complete
  2. Passed first chamber Complete
  3. Passed both chambers Complete
  4. Enacted Complete
  5. Effective Since Oct 1, 2025
What do these statuses mean?
Introduced
Filed in the legislature; may be waiting for a committee hearing.
Passed a chamber
Approved by one or both chambers; awaiting further action.
Enacted
Signed into law, or became law without a signature or over a veto.
Effective date
The date the law says it takes effect. Once it has passed, the page shows "Effective" and the date. A court order can still block a law; if we know of one, the summary says so.
Dead / vetoed
Vetoed, failed, or the session ended without action.

In one paragraph

HB 178 (Chapter 427 of 2025) limits government AI use. State and local government entities and state officers may not use an AI system for cognitive behavioral manipulation, to classify people in ways that cause unlawful discrimination or disparate impact, for a malicious purpose, or to surveil public spaces except to find a missing, endangered or wanted person or as the facial surveillance law allows. AI-produced material published without review by a trained human must be labeled, and public-facing AI interfaces disclosed. Any AI recommendation or decision that could affect a person's rights must be reviewed by a responsible human who can reject or modify it. Effective October 1, 2025.

Plain-English summary, written with AI assistance. The official text controls.

What it means for business

Vendors selling AI tools to Montana agencies and local governments must support labeling, disclosure and human review of outputs.

Key provisions

  1. Prohibits government entities and state officers from using AI systems for cognitive behavioral manipulation, discriminatory classification, malicious purposes, or surveillance of public spaces (except to locate missing, endangered or wanted persons or under Title 44, chapter 15, part 1)
  2. Material produced by an AI system and published without review by a human in an appropriate responsible position must carry a disclosure that AI produced it
  3. Use of an AI system in a public-facing interface must be disclosed
  4. Peace officers investigating crimes are exempt from disclosure where it would endanger safety or seriously jeopardize an investigation
  5. AI recommendations or decisions that could affect a person's rights, duties, privileges or immunities must be reviewed, and may be rejected or modified, by a trained state officer or public employee
  6. Effective October 1, 2025

Latest legislative action

May 5, 2025. Signed by Governor; Chapter 427

Sponsors

NameRoleDistrict
R Sponsor HD-003

Roll call votes (showing 3 of 8)

H (H) 2nd Reading Senate Amendments Concurred Apr 11, 2025

100 yea0 nayPassed

H (H) 3rd Reading Passed as Amended by Senate Apr 11, 2025

96 yea3 nay1 otherPassed

S (S) 3rd Reading Concurred Mar 27, 2025

50 yea0 nayPassed

Topics and industries

Affected industries

This page is general information, not legal advice. Summaries are AI-assisted and may contain errors; read the statute for the controlling text and talk to a lawyer about your situation. Full disclaimer · Report an error