If your shipment requires an export license, you will need to use PS Form 2976-A, Customs Declaration and Dispatch Note — CP 72, and ship your international mailpiece to the destination country via Express Mail International® service or Priority Mail International® service. To determine mail class availability and weight/size limits, refer to the Individual Country Listings in Mailing Standards of the United States Postal Service, International Mail Manual (IMM\u00A8) at http://pe.usps.com/text/Imm/immctry.htm.