20 U.S.C. § 1098f

In addition to any deferral of repayment of a loan made under this subchapter pursuant to section 1078(b)(1)(M)(iii), 1087e(f)(2)(C), or 1087dd(c)(2)(A)(iii) of this title, a borrower of a loan under this subchapter who is a member of the National Guard or other reserve component of the Armed Forces of the United States, or a member of such Armed Forces in a retired status, is called or ordered to active duty, and is enrolled, or was enrolled within six months prior to the activation, in a program of instruction at an eligible institution, shall be eligible for a deferment during the 13 months following the conclusion of such service, except that a deferment under this subsection shall expire upon the borrower’s return to enrolled student status.