to make grants to individual Indian students to meet, on the basis of need, any educational expense of attendance in a postsecondary education program (as determined under the contracts applying to the postsecondary education program administered by tribes under the Indian Self Determination and Education Assistance Act (
[Public Law 93–638]) [
25 U.S.C. 5301 et seq.]), to the extent that such expense is not met from other sources or cannot be defrayed through the action of any State, Federal, or municipal Act, except that nothing in this subsection shall be interpreted as requiring any priority in consideration of resources; and