The agency head (or designee) responsible for carrying out the
provisions of this subpart shall mail or hand-deliver an initial demand
for payment to the debtor. In the initial demand, the debtor shall be
notified that interest on the debt will start to accrue from the date on
which the notice is mailed or hand-delivered, but that payment of
interest will be waived if the debt is paid by the due date, or within
30 days of the date of notice, if no due date is specified. The initial
demand shall also state that administrative costs of recovering the
delinquent debt will be assessed if payment is not received by the due
date.