›Tripura HC rules in favour of ONGC subsidiary in a case related to levy on inter-state electricity sale Tripura HC rules in favour of ONGC subsidiary in a case related to levy on inter-state electricity sale SECTIONS Tripura HC rules in favour of ONGC subsidiary in a case related to levy on inter-state electricity saleBy Share Synopsis The court said the state government can’t levy duty on the power producer’s inter-state sale of electricity. It also termed as “illegal and unconstitutional” a clause in Tripura’s Electricity Duty Act, 2019 that allows the state government to levy a duty on inter-state sale of electricity.