Excise duty on monofilament graded by availability of input duty credit, with a lower rate where no credit is claimed. The notification substitutes the table entry for tariff headings 5406.11 and 5406.12 to impose differential ad valorem excise duties on monofilament of high density polyethylene and polypropylene, providing a lower duty rate when no input duty credit has been claimed under the Central Excise Rules and a higher rate for all other cases.