For a Priority Mail Open and Distribute mailing with postage applied by frank or penalty mail permit imprint, the mail service provider must use a manifesting system to account for the Priority Mail postage for each sack or tray. Manifesting is the accepted industry method of entering nonidentical permit imprint mailings and allows for the use of a computer system that automatically transmits the weight information from a scale to the computer system to document the postage for each sack or tray. The recommended format for the manifest and summary page is in Appendix D.