; or (ii) based on documentation presented to the Secretary of substantial economic or personal hardship. (e) Institutional support for fellows An eligible institution that receives a grant under this section may reserve not more than ten percent of the grant amount for academic and career transition support for graduate fellowship recipients and for meeting the institutional obligation described in subsection (d)(3)(B). (f) Restriction on use of funds An eligible institution that receives a grant under this section may not use grant funds for general operational overhead of the institution. (g) Definitions In this section: (1) The term eligible institution means an institution of higher education, or a consortium of such institutions, that offers a program of postbaccalaureate study leading to a doctoral degree. (2) The term Secretary means the Secretary of Education.