The probe agency told the Special Judge Arvind Kumar that the accused -- Shivani Saxena, an "active" director of Dubai- based Ms UHY Saxena and Ms Matrix Holdings -- may flee from the justice and hamper the ongoing probe, if she was granted the relief.
It told the court that other accused, including Shivani's husband Rajiv, were yet to be apprehended and it was not a fit stage to grant her bail.
During the arguments, ED's advocate N K Matta also claimed in the court that Shivani was not cooperating and the probe was at an initial stage.
In her bail application, the accused has claimed that she was not required in the case because investigation was already complete since the charge sheet has already been filed.
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The ED had on September 13 filed the charge sheet against her and others.
Shivani Saxena and her husband Rajiv are residents of Palm Jumeirah in Dubai, an archipelago which is home to the most expensive properties in the United Arab Emirates (UAE), the charge sheet said.
The agency claimed that its probe had found that AgustaWestland, United Kingdom, had "paid an amount of Euro 58 million as kickbacks" through two Tunisia-based firms.
"These companies further siphoned off the said money in the name of consultancy contracts to M/s Interstellar Technologies Limited, Mauritius and others which were further transferred to M/s UHY Saxena and M/s Matrix Holdings Ltd, Dubai and others," the charge sheet had alleged.
On January 1, 2014, India had scrapped the contract with Finmeccanica's British subsidiary AgustaWestland for supplying 12 AW-101 VVIP choppers to the IAF over alleged breach of contractual obligations and charges of kickbacks of Rs 423 crore paid by it to secure the deal.