The May 12, 2008, implementation of the new prices and fees will also include an updated version of Publication 97, Express Mail Manifesting Technical Guide, and Publication 97A, Express Mail Manifesting Implementation and Administration Guide. Express Mail® Manifesting is an automated system that allows a mailer to document postage and fees for all pieces in an Express Mail mailing through the transmission of an electronic file to the U.S. Postal Service®.