; (V) leveraging resources across climatological patterns or time zones to account for resource availability and weather patterns; (VI) avoidance, to the maximum extent practicable, of sensitive environmental areas and cultural heritage sites; (VII) reasonable and economical use of existing rights-of-way; (VIII) market facilitation benefits, including, at a minimum, increased competitiveness, liquidity, and integrity of broader geographic markets; (IX) avoided costs and deferred cost savings, including reduced generation costs and reduced future transmission investment costs; (X) the integration of grid-enhancing technologies; (XI) meeting local, State, and Federal policy goals, including goals established in decarbonization, climate, and clean energy laws (including regulations); (XII) protections to maintain just and reasonable rates for customers; and (XIII) any other production costs savings or other economic benefits from proposed transmission projects; (B) require that regional and interregional cost-allocation methodologies allocate costs on the basis of the multiple benefits described in subclauses (I) through (XIII) of subparagraph (A)(vi); (C) incorporate a 10- to 20-year future resource mix for each load-serving entity and State; (D) ensure that local or regional transmission planning processes do not impair interregional and interconnection-wide transmission planning processes; (E) require transmission providers to maximize the use of portfolio-based cost allocations; (F) in cases in which costs and benefits are difficult to quantify, may allocate transmission investment costs among transmission system customers in proportion to— (i) in the case of regional projects, the share of electricity of each customer in the region; or (ii) in the case of interregional projects, the share of electricity of each customer in each applicable region