A FRN is already backed by resources and assets. Collectively all property and Labor is pledged. That is why you declare a value to customs when you ship internationally. Also, so they can tax etc.
Printed copy · Anthology Volume 9, page 152Printed copy from The Tender For Law Anthology, Volume 9, page 152 (printed 13 June 2014). Added by this site; not part of the Facebook export.