(a) The Commission may require applicants for licenses subject to competitive bidding to submit an upfront payment.？In that event, the amount of the upfront payment and the procedures for submitting it will be set forth in a Public Notice.？Any auction applicant that has previously been in default on any Commission license or has previously been delinquent on any nontax debt owed to any Federal agency must submit an upfront payment equal to 50 percent more than that set for each particular license.？No interest will be paid on upfront payments.