Postal Service, 475 L'Enfant Plaza SW, RM 4446, Washington, DC 20260-5015. Email comments, including the name and address of the commenter, to: PCFederalRegister@usps.gov , with a subject line of “Duty Collection for Domestic Mail.” The Postal Service is implementing these requirements immediately to avoid a delay or suspension of service for items being sent from the affected insular possessions and territories to the CTUS. 410(a), the Postal Service invites public comments on the described revisions. The Postal Service adopts the described changes to Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM), incorporated by reference in the Code of Federal Regulations.