Customs duty cap limits excess import duty on goods under sub heading 8703.00 to a prescribed ad valorem rate. Exempts imports under sub heading 8703.00 of the Customs Tariff from any basic customs duty in excess of the amount calculated at the rate of 100 per cent ad valorem, effectuating a cap on duty chargeable by operation of a miscellaneous exemption notification issued under the Customs Act, 1962.