Federal energy regulators on Monday approved two final rules aimed at updating transmission regulations for grid planners and settling disputes over who should pay for them — two key priorities for delivering on the Biden administration’s goal of reaching 100% carbon-free power generation by 2035.

Members of the three-person Federal Energy Regulatory Commission voted 2-1 to approve the new rules on regional transmission planning and cost allocation, marking the first time in more than a decade that the commission has updated those rules.