All international addressing standards apply. See 122.
In addition to the markings required in 234.2 for Priority Mail International parcels, in 244.2 for First-Class Mail International items, and in 254.2 for First-Class Package International Service items, the mailer must mark the item “Free Matter for the Blind” in the upper right-hand corner of the address side of the mailpiece. In addition, the mailer must affix to the address side of the mailpiece a copy of the label depicted in Exhibit 274.2. The mailer may photocopy the image and apply it to the item.
Free Matter for the Blind Label