As part of implementing the interim final rule on heightened requirements for foreign Importers of Record (IORs), published November 6, 2026, U.S. Customs and Border Protection (CBP) announced three new data fields for Forms 3461 and 7501 and their electronic equivalents. The fields identify U.S. IOR eligibility, whether a broker acts as both filer and IOR on behalf of a principal, and the principal's IOR number. The changes take effect January 5, 2027.