1. Short title This Act may be cited as the Wise Investment in Children Act of 2023 or the WIC Act of 2023 . 2. Age of eligibility for children under the special supplemental nutrition program (a) Definition of child Section 17 of the Child Nutrition Act of 1966 ( 42 U.S.C. 1786 ) is amended— (1) in subsection (b), by striking paragraph (2) and inserting the following: (2) Child The term child means— (A) a person who has attained their first birthday but has not yet attained their fifth birthday; and (B) for purposes of subsection (d)(3)(A)(iii)(II), a person who has attained their first birthday but has not yet attained their sixth birthday. ; (2) in subsection (e)(4)(A), by striking up to age 5 ; and (3) in subsection (f)(7)(D)(i), by striking under the age of 5 . (b) Certification Section 17(d)(3)(A)(iii) of the Child Nutrition Act of 1966 ( 42 U.S.C. 1786(d)(3)(A)(iii) ) is amended— (1) by striking A State and inserting the following: (I) In general A State ; and (2) by adding at the end the following: (II) 5-year-old children (aa) In general Subject to a waiver under clause (vi), beginning not later than October 1, 2028, a State shall certify a participant child who has had a fifth birthday but has not yet attained their sixth birthday, during the period that ends on the earlier of— (AA) the sixth birthday of the child; and (BB) the first date on which the child attends full day kindergarten. (bb) Requirements Each State that certifies a child under item (aa) shall— (AA) ensure that the participant child receives required health and nutrition assessments