; (ii) of more than 75 percent but not more than 100 percent of State median income, the copayment shall be more than 0 but not more than 2 percent of that family income, toward such cost for all such children; (iii) of more than 100 percent but not more than 125 percent of State median income, the copayment shall be more than 2 but not more than 4 percent of that family income, toward such cost for all such children; and (iv) of more than 125 percent but not more than 150 percent of State median income, the copayment shall be more than 4 but not more than 7 percent of that family income, toward such cost for all such children. (C) Special rule The State shall not require a family with a child that is eligible for a Head Start program under the Head Start Act ( 42 U.S.C. 9831 et seq.) to pay a copayment under this paragraph for any eligible child in the family. . 106. Limitations Section 658F is amended— (1) by striking the section heading and inserting the following: 658F. Limitations ; and (2) in subsection (b)(1), by striking section 658O(c)(6) and inserting section 658O(b)(6) . 107. Activities to improve the quality of child care Section 658G of the Child Care and Development Block Grant Act of 1990 ( 42 U.S.C. 9848e ) is amended— (1) in subsection (a)— (A) in paragraph (1)— (i) by striking A State and all that follows through for activities and inserting A State that receives a payment under section 658J shall reserve and use the quality child care amount described in paragraph (2) for activities ; and (ii) by adding for all age groups of eligible children before , and is in alignment with ; and (B) by striking paragraphs (2) and (3) and inserting the following: (2) Quality child care amount Such State shall reserve and use— (A) during fiscal years 2018 through 2020, from each payment made to the State for a fiscal year, a quality child care amount equal to 50 percent of the allotment