S. 4128 would require the Government Accountability Office to provide a consolidated report to the Congress on priority recommendations that remain unimplemented and share information publicly on the potential costs of those recommendations. CBO estimates that enacting S. 4128 would not affect direct spending or revenues. CBO has not estimated the discretionary costs of implementing the bill. The bill contains no intergovernmental or private-sector mandates as defined in the Unfunded Mandates Reform Act.