On or about March 22, 2007, LBX imported into Savannah, Georgia four excavators that contained diesel engines. U.S. Customs and Border Protection inspection of the engines revealed that the engines bore metal Emissions Information Labels that were not permanently affixed to the engine and could be removed without destroying or defacing the label, in violation of Sections 203(a) and 213(d) of the CAA, 42 USC 7522(a) and 7547(d), and the Compression-Ignition nonroad engine regulations, 40 CFR Part 89.