The court said the move was meant to enable investigators to elicit more information from him in connection with the Delhi liquor scam case.
It gave orders to this effect in response to a petition filed by the ED after producing Pillai before the court following the completion of his three-day custody.
The ED informed the court that it collected information from Pillai about the transactions carried out in hotels with the help of documents collected by investigators.
Moreover, the questioning of those involved in the scam with the help of eyewitnesses was yet to be completed, the probe agency said in court.
Meanwhile, the ED also issued separate notices to YSRCP MP Magunta Srinivasulu Reddy and chartered accountant Gorantla Butchibabu, asking them to appear before it on 17 and 18 March, respectively.
Reddy and Butchibabu might also be questioned in the presence of Pillai.
According to the ED, the entire conspiracy was orchestrated by Vijay Nair, a representative of former Delhi deputy chief minister Manish Sisodia and other AAP leaders, along with the South Group — comprising of pharma company director Sarath Reddy, Srinivasulu Reddy, Raghav Magunta, and K Kavitha.
In the remand of Sisodia, who was arrested a few days ago, the ED said that Kavitha was represented by Pillai, beauty salon chain owner Abhishek Boinpally and CA Butchibabu.