Require rules to limit GHG emissions
HB 660, titled "Require rules to limit GHG emissions," would have mandated the Montana Department of Environmental Quality (DEQ) to develop specific rules for limiting greenhouse gas emissions. This bill sought to amend existing state law (Section 75-2-112, MCA) by requiring the DEQ to create regulations to protect public health, safety, welfare, and the environment from these emissions. The legislation directly affects the DEQ by expanding its regulatory responsibilities to include greenhouse gases.
Bill status
died
1 of 4 stages cleared
Introduction
Feb 2025
Committee Review
Floor Vote
Governor
Introduced Feb 21, 2025
Last action May 20, 2025
Maddy AI version diff · 1 comparison
What changed between versions
LC1392.pdf
→
HB0660_1.pdf
·
3 edits
MINOR
The bill was renumbered from LC 1392 to HB 660.1 and the sponsor list was expanded to include additional legislators. The substantive policy content regarding greenhouse gas emissions and departmental authority remains unchanged, with only formatting and line number adjustments.
TECHNICAL
Bill number changed from LC 1392 to HB 660.1
Sponsor list expanded to include additional legislators
Line numbers and page headers adjusted for formatting
Floor votes
How they voted
No floor votes recorded yet.
Full legislative history
Actions timeline
Total actions
21
Key actions
0
Committee
1
Amendments
1
Mar 3, 2025
Amended
(H) Tabled in Committee - (H) Natural Resources
lower
Feb 22, 2025
Committee
(H) Referred to Committee - (H) Natural Resources
lower
Feb 21, 2025
Introduced
(H) Introduced
lower
1 primary · 0 co-sponsors
Sponsors
Role
Legislator
Party
State
District
P
Debo Powers
DDemocratic
Ask Maddy
·
AI policy assistant
Ask Maddy about HB 660
Scope: MT
Hi! I can help you understand HB 660. What would you like to know?
Try one of these
i
Maddy answers using official bill text and legislative records. Always verify before sharing.
Sources cited inline