Legislative history is the background and events leading to the enactment of a statute, including hearings, committee reports, and floor debates. Moreover, legislative history that is recorded can be used to later aid in interpreting a statute.

Child Support Enforcement Legislative History
This link will provide you with a legislative history of child support enforcement through the first session of the 112th Congress: https://greenbook-waysandmeans.house.gov/2012-green-book/child-support-enforcement-cover-page/legislative-history