India, Dec. 19 -- The Delhi high court on Friday sought custom department's response in IndiGo's petition seeking a refund of over Rs.900 crore in customs duty paid on aircraft engines and parts re-imported into India after being repaired abroad, even as the department termed the petition as premature.

The department's lawyer, Anuraj Ojha, told a bench comprising Justices V Kameshwar Rao and Vinod Kumar that the airline could not seek a refund unless the bills of entry were reassessed.

"Without there being a reassessment refund cannot be given, so the writ petition in my case is premature in the sense that no reassessment of the bills of entry has been carried out at this stage," Ojha submitted.

Ojha further argued that the transaction...