Congressional Budget Office Cost Estimate: H.R. 5121, A Bill to Further Protect the United States Aviation System from Terrorist Attacks [open pdf - 29KB]
From the Summary: "H.R. 5121 would authorize funding for aviation security programs administered by the Department of Homeland Security (DHS). CBO [Congressional Budget Office] estimates that enacting H.R. 5121 would increase direct spending by $298 million in 2005 and about $4.1 billion over the next 10 years. Assuming appropriation of the necessary amounts, we also estimate that implementing H.R. 5121 would add $212 million in 2005 and almost $4.5 billion to discretionary spending over the next five years. Those amounts assume that future appropriations to pay salaries and expenses of baggage screeners would be reduced following installation of new baggage screening equipment at airports. Enacting the bill also could increase revenues, but we estimate that any such increase would not exceed $500,000 a year. H.R. 5121 contains an intergovernmental mandate as defined in the Unfunded Mandates Reform Act (UMRA) because it would require all armed law enforcement officers, including state, local, and tribal personnel, to identify themselves with a special, standardized credential when traveling on aircraft. CBO estimates that the costs to law enforcement agencies would be minimal and thus would not exceed the threshold established by UMRA ($60 million in 2004, adjusted annually for inflation)."
Congressional Budget Office: http://www.cbo.gov/