The FMCSA monitors and ensures compliance with regulations governing both safety (all carriers) and commerce (for-hire carriers). Companies may find they are subject to both registration requirements (USDOT Number and MC Number) or either one separately. FMCSA has launched a phased rollout of the Unified Registration System (URS). All new registration applicants must use the new URS Application.URS combines various forms that carriers, freight forwarders and brokers currently use to register and update their information with the Agency into a single, online registration application.Only the initial registration by new applicants will be done using the URS online registration application.