What is a requirement for Bound Printed Matter?

The requirement for Bound Printed Matter is that it may weigh no more than 15 pounds and must be permanently bound. This category of mail is specifically designed to accommodate items like catalogs, books, and other printed materials that are securely bound. The weight limitation ensures that these items can be efficiently processed and delivered within the postal system, while the requirement for permanent binding helps maintain the integrity and quality of the mail being sent. Items that are bound in a way that allows them to maintain their structure are a key characteristic of Bound Printed Matter, distinguishing it from other types of mail. This is an important aspect that carriers need to be aware of in order to properly handle and categorize mail items.