; (B) to the extent practicable, be at a Defense Agency; (C) include a stipend for transportation and living expenses incurred by the fellow during the fellowship; and (D) be completed during the initial 2-year period of the fellowship. (3) Mentorship To the extent practicable, each fellow shall be paired with a mid-level or a senior-level official of the Defense Agency who shall serve as a mentor during the internship. (f) Extensions (1) In general Subject to this section, a fellow may apply for, and the Secretary may grant, a 1-year extension of the fellowship. (2) Number of extensions There shall be no limit on the number of extensions under paragraph (1) that the Secretary may grant an eligible student. (3) Limitation on degrees Students shall be limited to obtaining a maximum of the following graduate degrees with fellowship funds— (A) 2 master’s degrees; and (B) 1 doctorate of philosophy. (4) Treatment of extensions An extension granted under this subsection does not count for the purposes of— (A) the number of fellowships granted under subsection (d)(1); or (B) the percentage of fellowships granted to eligible students. (5) Extension requirements A fellow may receive an extension under this subsection only if— (A) the fellow is in good academic standing; (B) the fellow has satisfactorily completed an internship under subsection (e); and (C) the fellow is currently enrolled full-time at an institution of higher education and pursuing, in a STEAM field— (i) a bachelor’s degree; (ii) a master’s degree; or (iii) a doctorate of philosophy. (g) Limitation on administrative costs For each academic year, the Secretary may use not more than 5 percent of the funds made available to carry out this section for administrative purposes, including for purposes of— (1) outreach to institutions of higher education to encourage participation in the program