Effective April 1, 2013, the Postal Service™ is revising Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM®) 708.5.1.1 to clarify standards relating to the data requirements of the electronic file that mailers submit along with mailings bearing Intelligent Mail® package barcodes (IMpb). This revision clarifies that mailers may include either the ZIP + 4® routing information or destination address when submitting piece-level information to the USPS in their electronic files.