Gautam Adani-led Adani Enterprises on Tuesday said it has signed a concession agreement with the Airports Authority of India (AAI) to operate the airports at Jaipur, Guwahati, and Thiruvananthapuram. The concession period is 50 years .

“We are pleased to inform you that Adani Jaipur International Airport Limited, Adani Guwahati International Airport Limited and Adani Thiruvananthapuram International Airport Limited, wholly-owned subsidiaries of the company, have signed the Concession Agreement on 19th January, 2021 with Airports Authority of India for the Operations,” the company said in a regulatory filing.

The Airports Authority of India in a tweet said: “The concession fee that AAI will receive after leasing out six airports will be used to maintain and develop other brownfield airports and to also develop the regional connectivity scheme and greenfield airports throughout the country.”

Adani Enterprises had won the rights to run six airports — Lucknow, Ahmedabad, Jaipur, Mangalore, Thiruvananthapuram and Guwahati — through the PPP model after a global competitive bidding process in February 2019.

The privatisation of the three airports had been challenged in the courts in Assam and Kerala.

Although the courts have not decided on the matter, they have not stayed the privatisation. The concession agreement, officials said, would be subject to the court order.

In November 2020, the Kerala government approached the Supreme Court against the handing over of the airport to Adani.