Today the Federal Register published the final rule which requires the use of an Intelligent Mailâ® unique tracking barcode on all commercial parcels (except Standard Mailâ® parcels) claiming presort or destination entry pricing. The final rule encourages immediate use of an Intelligent Mail package barcode (IMpb) by providing end-to-end tracking and confirmation of delivery on all commercial parcels except Standard Mail and Package Services parcels. Some standards in this final rule are effective January 22, 2012, with an optional-use transitional period for specific requirements until July 2, 2012. Use of the IMpb becomes mandatory effective January 7, 2013. The complete final rule Federal Register can be found at and also will be added to the archive on Postal Explorerâ®.