Simplify the following text for a Grade 13 native English-speaking person.
Original: The airport is operated by the Civil Aviation Authority of Singapore ( CAAS ) and is the home base of Singapore Airlines , Singapore Airlines Cargo , SilkAir , Tiger Airways , Jetstar Asia Airways , Valuair , and Jett8 Airlines Cargo .
Simplified: The airport , operated by the Changi Airport Group , is the home base of Singapore Airlines , Singapore Airlines Cargo , SilkAir , Tiger Airways , Jetstar Asia Airways , Valuair , and Jett8 Airlines Cargo .