The policymaker said the RBI had not reached the point where specific actions were under consideration.
Sebi also approved new delisting rules.
The 24-hour delivery offer applies only to select postal codes and is not available across the country.
Mallya, once known as the "King of Good Times" for his flamboyant lifestyle, has until Friday to appear before an IDBI committee to explain why he should not be declared a "wilful defaulter".
Sebi has asked clearing houses to establish separate funds for all segments of the market including equity, debt and currency.
Piramal, controlled by billionaire Ajay Piramal, and APG will invest in local infrastructure companies through rupee-denominated mezzanine instruments.
A sluggish economy and stalled bureaucratic decision-making for the past two years thwarted capital investment and dented earnings, making it tough for the companies to raise funds.
The panel, however, set some conditions for the company, including that Cairn India will have to upload the status of environment compliance, including results of monitored data, on its website and update it periodically.
The drive against insider trading comes after SEBI last year received enhanced investigation powers from parliament, including the ability to monitor call records.
Both companies can now complete the deal.
Several brokerages lifted their outlooks for the BSE Sensex and companies were queuing to ride the wave of political euphoria
The British mobile phone operator was widely expected to go for an international arbitration after its talks with the Indian government failed to find a solution last year.
There are just 1,500 drug inspectors responsible for more than 10,000 factories in India
At the bank's current market price, the stake on offer is worth about Rs 5,700 crore
All of Ranbaxy's India-based factories are currently banned by the FDA from exporting medicines to the United States, the company's largest market, after the regulator's inspection found violation of its so-called good manufacturing practices.
The Securities and Exchange Board of India (SEBI) unveiled new proposals, broadening the scope of who can be held liable for insider trading violations.
The market regulator is wielding an unprecedented level of control over how mutual funds operate, delaying new launches and dictating investment strategy, frustrated insiders in the embattled industry say.
Its factory in Chikalthana in western India was last month hit by the British drug regulator's curb on imports from the plant over manufacturing deficiencies.
It was put on hold in 2008 after the global financial crisis.
Ranbaxy, which is 63.5 per cent-owned by Japan's Daiichi Sankyo Co and gets more than 40 per cent of its sales from the United States, did not immediately respond to a request on Wednesday for comment on the FDA observations.