Qatar Airways' private aviation subsidiary Qatar Executive has added a new program in which corporate and private customers can buy flight hours without membership fees. The "Diamond Agreement" program requires customer to buy a minimum of 50 hours flight time, which come with no requirements regarding annual use nor maximum carryover restrictions. Flights can be booked as close in as 72 hours in advance. Qatar Executive currently operates a fleet of 18 Gulfstream and Bombardier Global 5000 aircraft.