FMCSA adopts regulations to implement section 4118 of the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU). The regulations require intermodal equipment providers (IEPs) to: register and file with FMCSA an Intermodal Equipment Provider Identification Report (Form MCS-150C); establish a systematic inspection, repair, and maintenance program to assure the safe operating condition of each intermodal chassis; maintain documentation of their maintenance program; and provide a means to effectively respond to driver and motor carrier reports about intermodal chassis mechanical defects and deficiencies. The regulations also require IEPs to mark each intermodal chassis offered for transportation in interstate commerce with a U.S. Department of Transportation (USDOT) identification number. These new regulations, for the first time, make IEPs subject to the Federal Motor Carrier Safety Regulations (FMCSRs), and call for shared safety responsibility among IEPs, motor carriers, and drivers. Additionally, FMCSA adopts inspection requirements for motor carriers and drivers operating intermodal equipment. Improved maintenance is expected to result in fewer chassis being placed out-of-service (OOS) and fewer breakdowns involving intermodal chassis, thus improving the Nation's intermodal transportation system. Because inadequately maintained intermodal chassis create risks for crashes, this final rule will also help ensure that commercial motor vehicle (CMV) operations are safer.