A coalition of 41 businesses and nonprofits submitted a petition to the PSC in March of 2024 in the wake of a state district court finding in Held v. Montana that the state’s right to a “clean and healthful environment” incorporates a right to a “stable climate system.”
The petition before the PSC had two parts. One asked the agency to adopt rulings “affirming its obligation to consider the adverse climate impacts of greenhouse gas emissions under the Montana Constitution and the statutory and regulatory framework governing its decision making.” The other included a specific rule giving the commission a framework for weighing the social, economic and environmental costs of different energy sources. That framework, developed by the U.S. Environmental Protection Agency, is called the Social Costs of Greenhouse Gases.
In his presentation before commissioners on Tuesday, PSC Chief Legal Staff Lucas Hamilton argued that the authority for declaratory rulemaking rests with the judicial and legislative branches, not with an executive-branch agency such as the Public Service Commission. He urged the commission to reject the declaratory ruling part of the petition. The commission has not yet acted on the other part of the petition regarding the implementation of the Social Costs of Greenhouse Gases analysis.