Any commercial vehicle that operates at a gross vehicle weight (GVW) or combined gross weight (CGW) of 26,001 pounds or heavier requires IRP registration. Without it, these commercial vehicles will have to obtain alternative commercial trip permits when operating in neighboring jurisdictions. Vehicles that weigh less than 26,000 pounds could be exempt from IRP credentials. To be completely sure about whether or not to file for IRP, reference this IRP directory of all the jurisdictions it covers.