Generally revise utility lines and facilities laws

This bill revises Montana's laws governing utility lines and facilities to streamline the process for building new electric transmission infrastructure. It allows the Public Service Commission to issue certificates of public convenience and necessity for transmission projects rated above 69 kilovolts, with a 270-day review period that considers factors like reliability, cost-effectiveness, and the use of advanced transmission technologies. The legislation also introduces optional ratemaking procedures that let eligible utilities separate transmission costs from other services and adjust rates annually based on actual costs and revenues. Additionally, the bill defines various advanced transmission technologies and grants the commission rulemaking authority to implement these changes.