; and (iii) by striking an elementary or secondary school in each of the second and third places in which such term appears and inserting such a school . (2) Transition from elementary or secondary school Section 202(d)(7)(B) of such Act ( 42 U.S.C. 402(d)(7)(B) ) is amended by adding at the end the following sentence: An individual who has been in full-time attendance at an elementary or secondary school shall, during a succeeding period of nonattendance at such school, be deemed to be a full-time secondary-school student if (i) such period is 4 calendar months or less, and (ii) the individual shows to the satisfaction of the Commissioner that he intends to be in full-time attendance at a post-secondary educational institution immediately following such period. (d) Definition of post-Secondary educational institution Section 202(d)(7)(C) of such Act ( 42 U.S.C. 402(d)(7)(C) ) is amended by adding at the end the following: (iii) A post-secondary educational institution is a school or college or university that provides post-secondary education and— (I) is operated or directly supported by the United States, or by any State or local government or political subdivision thereof, (II) has been approved by a State or accredited by a State-recognized or nationally recognized accrediting agency or body, or (III) whose credits are accepted, on transfer, by not less than three institutions which are so accredited, for credit on the same basis as if transferred from an institution so accredited. . (e) Conforming amendments (1) Section 202(d)(1)(E) of such Act ( 42 U.S.C. 402(d)(1)(E) ) is amended by inserting or an eligible full-time post-secondary school student after student . (2) Section 202(d)(1)(F) of such Act ( 42 U.S.C. 402(d)(1)(F) ) is amended by striking the earlier of— and all that follows through the age of 19, and inserting the following: the earlier of— (i) the first month during no part of which the child is a full-time elementary or secondary school student or an eligible full-time post-secondary school