EASA has not defined Commercial Air Transport (CAT) Operations in the draft aerodrome regulations; however, to meet requirements for EU-OPS (Regulation (EC) 1794/2006) the following definition applies:
'A flight carrying passengers, cargo or mail for remuneration or hire where the principal purpose for their carriage is to transport them, and where a seat on the flight or the right to have cargo or mail carried is available to any member of the public, shall be deemed to be for commercial air transport. This includes flights carrying passengers for remuneration or hire, which begins and ends at the same aerodrome.'