"Electrical energy originating from Nepal and Bhutan" will attract standard customs rate of "nil", the Central Board of Excise and Customs said in a notification.
India presently imports 1.5 Gigawatt (GW) of hydropower from Bhutan. This is projected to rise to 8 GW by 2022 and imports from Nepal too may start.
The notification said a customs duty of 40-89 paisa per kilowatt hour (kWh) or unit will be levied on power supplied from Processing Area of SEZ to Domestic Tariff Area (DTA).
The import duty will be 59 paisa per unit if the power was generated using a mix of domestically produced natural gas and imported Regasified Liquefied Natural Gas (RLNG) and 89 paisa if it was generated using RLNG alone.
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An import duty of 18-24 paisa per unit would be levied on electricity supplies from Non-Processing Area of SEZ to Domestic Tariff Area, the notification said.
"Electrical energy supplied to DTA by power plants of 1,000 MW or above, and granted formal approval for setting up in SEZ prior to February 27, 2009" will attract "nil" customs duty, the notification said.
It would be 21 paisa if generated through imported LNG.
Presently, power from project of 1,000 MW and above capacity are charged Rs 100 per 1,000 unit as import duty if the electricity is generated using imported coal and nil if generated using domestic coal. The duty for the same generated using domestic gas is Rs 110 per 1,000 kwh.