; and (II) the coincident export capability of the interregional transmission planning region; (ii) defining the coincident import capability of each interregional transmission planning region as being equal to the absolute value of the first 1/10 of the first percentile (0.1th percentile) of the coincident hourly electrical transfers of that interregional transmission planning region; (iii) defining the coincident export capability of the interregional transmission planning region as being equal to the absolute value of the last 1/10 of the 99th percentile (99.9th percentile) of the coincident hourly electrical transfers of that interregional transmission planning region; (iv) defining the coincident hourly electrical transfers of each interregional transmission planning region as being equal to the sum obtained by adding, with respect to each hour, the hourly electrical transfers of all balancing authorities that, in the determination of the Commission, most closely correspond to the interregional transmission planning region in question using data from Form EIA–930 of the Energy Information Administration for the 5-year period ending on— (I) for each plan described in subparagraph (G) that is required to be submitted by the date described in that subparagraph, the date that is 1 year before the date of enactment of this section; and (II) for each plan submitted under paragraph (4)(A) and each updated plan submitted under paragraph (4)(B), the date that is 1 year before the deadline for submission of that plan; and (v) defining the hourly electrical transfers of each interregional transmission planning region as being equal to, for each hour— (I) the hourly exports of that interregional transmission planning region; minus (II) the hourly imports of that interregional transmission planning region