Customs duty rationalisation: amendments adjust import duty rates on capital goods and increase aluminium import duty. Notification 103/90-Cus amends thirty prior customs exemption and tariff notifications under section 25(1) of the Customs Act to rationalise duty rates on capital goods and to increase certain import duties, including an upward revision of the per tonne duty for aluminium; amendments are effected by substituting revised percentage or ad valorem rates, omitting or replacing specified entries and tables, altering product descriptions, and modifying temporal or scope provisions where prescribed.