Graded basic customs duty for smart meters introduced, imposing time-phased duty rates and concessional import conditions. Imposes differentiated Basic Customs Duty rates and concessional caps on smart meters and specified components, linking each tariff entry to condition numbers and an Annexure that requires adherence to the Customs (Import of Goods at Concessional Rate of Duty) Rules, 2017 and prescribes successive time-phased validity periods for concessional treatment of finished goods and inputs/parts used in the manufacture of smart meters.