The sources withheld the name of the executive as he is not named as suspect in the preliminary inquiries.
Tatas role in supply of low floor buses by Tata Motors to Government of Tamil Nadu under JNNURM scheme of GoI will be probed by the CBI.
Ratan Tata himself had filed a petition in the court seeking a stay on publication of conversation between him and Nira Radia.
The Supreme court had on August 4 held that Niira Radia tapes were not private conversations and had an element of criminality.
The court asked as to why no action has been taken when it was clear in 2009 that all types of things were prima facie discussed.
The CBI had on July 31 told the Supreme Court that there was an element of criminality in Nira Radia tapes.
The court will also hear CBI's plea to call Anil Ambani as witness, sources had added.
The team would be scrutinising the tapes to ascertain if there were any elements of 'criminality' in them.
The team, constituting of five CBI officers and one Income Tax officer, has been asked to submit its report within four months.
The investigators would ascertain if there was anything in the transcripts that attracted action under law.
The court had stated that conversations will be picked at random from the envelopes containing the transcripts of over 5,000 calls.
The court took on record the transcripts of entire tapped conversations which have been put in 38 sealed envelopes.
Sources told CNN-IBN that Radia's lawyers are likely to move court and seek exemption on medical grounds.
The artwork titled "Pal, Pal, Pal, Pal..." is a formal response to the "leaks", through a treatment of the Radia tapes as a screenplay.
The court said the conversation should be transcribed otherwise everything will proceed on the basis of surmises and conjectures.
The court expressed displeasure and told the government that the probe report on Radia tapes leakage was hardly satisfactory.
The report says it is difficult to find by which source the tapes containing conversation between Ratan Tata and Nira Radia was leaked.
The original petition filed by Ratan Tata had only sought an inquiry into the leakage of the tape.
Rata Tata had claimed that the corporate lobbyist Nira Radia tapes should not be made public as it infringes on his right to privacy.
A Single COVID-19 Patient Can Infect 406 People in 30 Days if Preventive Measures Not Taken: ICMR
Transfer PM Cares Fund, Suspend Central Vista Plan: Sonia’s Suggestions to Free Up Covid-19 Resources
Fighting a Pandemic With Emptying Wallets: States Grapple With Revenue Shortfall, Gap in Govt Payouts
'Plague of The Snobs': How Coronavirus Pandemic Sparked Public Anger Against Global Elite