Under AB 2111, as amended by Papan, California’s Public Utilities Commission (PUC), Energy Commission, and Independent System Operator (ISO) would be required by January 1, 2028, to update their existing memorandum of understanding and workplan to reflect the requirements of Federal Energy Regulatory Commission Order 1920-A, including methods for evaluating resource portfolios under uncertainty. The bill also modifies portfolio planning to emphasize cost-effective integration that maintains ratepayer affordability across future uncertainties and adopts a risk-prudent approach. Additionally, the PUC’s transmission-focused guidance to the ISO must include sufficient infrastructure capacity to facilitate cost-effective procurement, improve resource diversity and competition by increasing interconnection capacity at specific locations, and separately provide risk-prudent guidance requesting approval of specific transmission projects and identifying supplemental or accelerated needs that enhance adaptability, reduce risk, or support competitive resource procurement.