; and (iii) inserting or, in the case of a qualifying post-secondary school student, in at least half-time attendance at a post-secondary educational institution before immediately following such period each place it appears. (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 qualifying post-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 at least half-time attendance at a post-secondary educational institution immediately following such period. . (c) 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 an institution described in section 102 of the Higher Education Act of 1965 ( 20 U.S.C. 1002 ). . (d) Conforming amendments (1) Section 202(d)(1)(E) of such Act ( 42 U.S.C. 402(d)(1)(E) ) is amended by inserting or a qualifying 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 a qualifying post-secondary school student, (ii) the month in which the child attains the age of 22, but only if the child is not a qualifying post-secondary school student during any part of such month, or (iii) the month in which the child attains the age of 26, . (3) Section 202(d)(1)(G) of such Act ( 42 U.S.C. 402(d)(1)(G) ) is amended by striking (if later) and all that follows through