Learn more about the specifications of Colorado IRP. Get IRP information in Colorado and learn more about the guidelines and regulations., International Registration Plan (IRP) Manual February 14, 2019 Table of Contents Introduction .. 1, International Registration Plan (IRP) Requirements for establishing business and residency Carrier must provide the following documents to prove that they have an established place of business or residency in Colorado., IRP Registration (International Registration Plan) for federal compliance, required for heavy vehicles (over 26,001 lbs or with 3+ axles) operating in multiple states., The International Registration Plan (IRP) is a registration reciprocity agreement among the states of the U.S. and provinces of Canada, providing the payment of license fees on the basis of total distance operated in all jurisdictions., The International Registration Plan (the Plan) is a registration reciprocity agreement among states of the United States and provinces of Canada providing for payment of license fees on the basis of total distance operated in all jurisdictions..