The Vectra Group Chairman has approached the Supreme Court seeking permission to travel abroad for medical treatment.
The CBI said there were certain facts which cannot be stated in an affidavit but could be disclosed in a sealed cover to the court.
The nation's external intelligence agency RAW had in January 2010 advised oil PSU ONGC against giving any business to the Global Vectra Helicorp Ltd but exactly a month later withdrew the advisory saying it was sent by mistake.
The Delhi High Court Wednesday issued notice to the union home ministry and the DGCA on a plea by Global Vectra Helicorp challenging the aviation regulator's decision to suspend the company's operations permit.
The CBI questioned the former army official over allegations that he had offered a bribe to Army chief VK Singh to approve a contract to obtain Tatra trucks for the Indian Army.
The court, which had on 10 April reserved its order on Tejinder Singh's complaint, will pronounce its order tomorrow.
Chief Financial Officer of Vectra Investments, Vikram Kakaiya and another senior executive Anil Mansaramani were grilled at length by CBI sleuths at the agency headquarters regarding ownership pattern of the group.
Though Tatra backed off from taking responsibility, it said the company will seek an explanation from Ravi Rishi regarding allegations of corruption.
Army chief General VK Singh has written to the CBI seeking more time to reply on the to the investigating agency's queries on his allegation of being offered a bribe of Rs 14 crore.
The agency has alerted all airports and exit points to ensure that Rishi does not leave the country.
CBI today registered a case for alleged irregularities in supply of all-terrain Tatra trucks through state-owned BEML to the Army.