The two major mandates below each stop at the edge of one sector. The Adam Walsh Child Protection and Safety Act (P.L. 109-248, 2006) requires fingerprint-based criminal-history checks of prospective foster and adoptive parents and child-abuse-registry checks of them and the other adults in the home, and from October 2008 it ended the state opt-out the 1997 Act allowed. Its section 152 carries no appropriation of its own; states may claim allowable costs through the 50 percent Title IV-E administrative match. The Child Care and Development Block Grant Act (P.L. 113-186, 2014) requires an FBI fingerprint check, NCIC and national sex offender registry searches, and state criminal, sex offender and child abuse and neglect registry searches in each state lived in during the past five years, repeated at least every five years, for staff of licensed, regulated or registered child care providers and of providers eligible for block grant funds. Neither reaches faith-based organizations, youth sports, camps, mentoring or private in-home caregivers, except where they provide child care that is licensed, regulated, registered or eligible for block grant funds.
The statute behind national background checks for these three populations leaves it to each state whether to require them.