S. 4687 would enhance the authority of the Department of Justice and the Department of Homeland Security (DHS) to detect and counter unmanned aircraft systems (UAS). The bill also would authorize a pilot program expanding UAS mitigation authority for certain state and local governments. Finally, the bill would establish a national counter-UAS training center and require DHS to develop a database that tracks UAS-related incidents. CBO estimates that enacting S. 4687 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.
