The US Transportation Security Administration (TSA) has published in the Federal Register an interim final rule to implement its air cargo screening programme known as the Certified Cargo Screening Program (CCSP). The CCSO enables the TSA to certify facilities in the air cargo supply chain to screen air cargo before turning it over to carriers. The rule – which provides guidelines for applying to become a CCSF, operation of CCSFs, and approval of firms and individuals who will validate CCSF facilities – comes into effect 16 November 2009 and public comments are accepted until that date.