Airports of Thailand (AOT)'s president Nitinai Sirismatthakarn said the group purchased Term of Reference for both bids.
AOT senior executive vice president for Business Development and Marketing Wichai Bunyu said he was confident that private retail business operators would join in the bids.
The ToR will be available until December 13. Bidders can submit proposals for Suvarnabhumi Airport on January 17, 2020, and Don Mueang Airport on January 20, 2020.
AOT will open proposals for both bids at the same time on January 27, 2020. Both concession are valid for 10 years and 3 months.