An advance refunding issue is not an issue of arbitrage bonds under this paragraph (c) if all excess gross proceeds of the refunding issue are used to pay interest that accrues on the refunding issue before the prior issue is discharged, and no gross proceeds of any refunding issue are used to pay interest on the prior issue or to replace funds used directly or indirectly to pay such interest (other than transferred proceeds used to pay interest on the prior issue that accrues for a period up to the completion date of the project for which the prior issue was issued, plus one year, or proceeds used to pay principal that is attributable to accrued original issue discount).