USAC encourages the use of this online filing system. However Item 21 Attachments
also may be manually submitted by mail, by fax, or by e-mail. For information
on filing Item 21 attachments, including manual filing options, refer to the Item
21 Attachments document in the Reference Area of the USAC website.
After March 26, you will be able to view your online attachment but you will not be able to modify or submit an attachment.