New Montana laws taking effect April 17, 2025

28 laws take effect April 17, 2025.

Of the 778 bills enacted since 2025, 774 have an effective date and 4 don't yet (listed below). A law here takes effect that day by its main provisions; parts of a staggered act may take effect on other dates.

Updated Oct 31, 2026 at 11:39 a.m. EDT.

Elections (6)

Agriculture (3)

  • SB 78 · 2025 Regular SessionPublished

    Revise laws related to marking hides and meat

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

  • SB 79 · 2025 Regular SessionPublished

    Repeal laws related to inspection of animals in feedlots

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

  • SB 80 · 2025 Regular SessionPublished

    Allow for digital copies of required documentation for transport of livestock

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

Finance (3)

Crime (2)

Government (2)

  • HB 88 · 2025 Regular SessionPublished

    Allow for automatic return of certain unclaimed property

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

  • SB 10 · 2025 Regular SessionPublished

    Extending onsite inspection timelines during state of emergency

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

Mining and Drilling (2)

Public Lands (2)

  • SB 357 · 2025 Regular SessionPublished

    Extend perfection deadline for certain Missouri River water reservations

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

  • SB 83 · 2025 Regular SessionPublished

    Revise law to recognize commission authority to regulate public use of private property under access agreements

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

Budget (1)

Civil Rights (1)

  • SB 137 · 2025 Regular SessionPublished

    Require excusal of prospective jurors aged 75 and older

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

Education (1)

  • HB 234 · 2025 Regular SessionPublished

    Extend the use of funding for lead-in-schools appropriated in 2023

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

Healthcare (1)

Housing (1)

  • HB 233 · 2025 Regular SessionPublished

    Provide for transfer of title of open spaces in final plat to HOA

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

Taxes (1)

  • SB 328 · 2025 Regular SessionPublished

    Revise deadline for appeal of county tax appeal board decision

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

Traffic (1)

  • SB 23 · 2025 Regular SessionPublished

    Increase thresholds for railroad accident reporting requirements

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

Wages (1)

  • SB 338 · 2025 Regular SessionPublished

    Revise workers' compensation insurance related to who may receive payments

    How we got this date

    Published by the legislature: All Sections: 2025-04-17.

    How effective dates are worked out

Enacted, but not yet dated (4)

These laws' texts tie their dates to something outside the legislative record (Contingent), or not enough is recorded yet to give one (Unresolved). They may take effect April 17, 2025 too; the record doesn't say.

Show all 4
  • HB 447ContingentEnact the Respiratory Care Interstate CompactEffective on the date the compact is legislatively enacted into law by the seventh member state
  • HB 56ContingentEstablish ambulance provider assessment fee programApproval by the United States department of health and human services of all waivers and approvals necessary to implement the assessment fee and supplemental payments
  • SB 233ContingentAdopting the interstate massage compactCompact legislatively enacted into law by the seventh member state
  • SB 279ContingentAdopt the dietitian licensure compactThe compact has been legislatively enacted into law by the seventh member state.