; (ii) harmonize interregional transmission planning processes and interconnection-wide transmission planning processes with other regional transmission planning processes, such as by using a joint model on a consistent timeline with a unified set of minimum requirements regarding needs, input assumptions, and benefit metrics; (iii) include as part of planning and cost-allocation processes the use of grid-enhancing transmission technologies and alternative transmission technologies that increase delivery of power over transmission networks, including, at a minimum— (I) dynamic line ratings; (II) topology optimization; (III) power flow control; (IV) advanced conductors and superconductors; and (V) storage-as-transmission; (iv) conduct interregional and interconnection-wide planning regularly and not less frequently than once every 5 years; (v) conduct interregional and interconnection-wide planning based on a range of possible future load and generation scenarios; and (vi) are required to incorporate in a transmission planning process the full scope of benefits of transmission investment, including, at a minimum— (I) reduced costs of electric energy to customers, including reduced costs associated with lower quantities of necessary capacity, ancillary services, and reserve margins; (II) access to resources in neighboring transmission planning regions; (III) the transmission of renewable energy or the ability of renewable energy to connect to the grid; (IV) improvements in reliability, resilience, and flexibility of the grid, including, at a minimum— (aa) reduced loss of load probability; (bb) increased resource diversity; (cc) increased climate hardening; and (dd) increased ability to maintain functionality during regionally appropriate weather conditions and severe weather scenarios; (V) leveraging resources across climatological patterns or time zones to account for resource availability and weather patterns