This bill revises laws related to coal-fired generation units in Montana, specifically addressing the responsibilities of owners regarding maintenance costs and the implications of abandoning ownership. It establishes that if an owner ceases to utilize power from a coal-fired generating unit and stops funding maintenance, they remain liable for future maintenance costs on a pro rata basis. Additionally, if an owner abandons their interest while another owner continues to operate the unit, the remaining owner may fund maintenance for a single cycle, with the abandoning owner required to reimburse any unrecovered costs. Importantly, the bill prohibits electricity ratepayers from being liable for maintenance costs incurred due to owners who do not serve Montana ratepayers.

Furthermore, the bill prohibits utilities from seeking stranded cost reimbursement from the commission if they cease to maintain ownership of a coal-fired generating unit before the established depreciation date, placing the financial burden on shareholders instead. It also ensures that remediation costs incurred by out-of-state owners cannot be passed on to Montana ratepayers. The bill includes provisions for codification, severability, and an immediate effective date upon passage and approval.