; (2) in paragraph (2)— (A) by striking 16 and inserting 14 ; and (B) by striking may and inserting shall ; (3) in paragraph (3)— (A) by striking may allow and inserting shall allow ; (B) by striking 26 and inserting 28 ; and (C) by striking , but in no event may a youth participate in the program for more than 5 years (whether or not consecutive) and inserting , except that the State shall allow youths participating in the voucher program who attain 28 years of age to complete their postsecondary education or training program ; (4) by amending paragraph (4) to read as follows: (4) The voucher or vouchers provided for an individual under this section shall be available for, and in an amount that shall not exceed, the cost of attendance (as defined in section 472 of the Higher Education Act of 1965) at an institution of higher education (as defined in section 101 of the Higher Education Act of 1965) or a postsecondary vocational institution (as defined in section 102(c) of such Act).