If, for any fiscal year, the amount made available pursuant to section
1864 of this title exceeds the sum of the amounts required to be distributed under paragraph (1) to the tribally controlled postsecondary career and technical institutions selected for the fiscal year under subsection (a)(1), the Secretary shall distribute to each tribally controlled postsecondary career and technical institution selected for that fiscal year a portion of the excess amount, to be determined by—