; (2) evaluates the current architecture of regional electricity grids (including international transmission connections of such grids) that together comprise the Nation’s electricity grid, with respect to— (A) potential growth in renewable energy generation, including energy generation from offshore wind; (B) potential growth in electricity demand; and (C) retirement of existing electricity generation assets; (3) analyzes— (A) the range of benefits that interregional transmission provides; (B) the impact of basing transmission project approvals on a comprehensive assessment of the multiple benefits provided; (C) synchronization of processes described in paragraph (1) among neighboring regions; (D) how often interregional transmission planning should be completed; (E) whether voltage, size, or cost requirements should be a factor in the approval of interregional transmission projects; (F) cost allocation methodologies for interregional transmission projects; and (G) current barriers and challenges to construction of interregional transmission projects