CJEU, 6 July 2017, Air Berlin, C-290/16: The pricing freedom recognised for air carriers by the regulation on the operation of air services does not preclude the application of a national law transposing the directive on unfair terms from leading to a declaration of invalidity of a term in the general terms and conditions and which allows separate flat-rate handling fees to be billed to customers who cancelled their booking or did not take a flight. When publishing their air fares, air carriers must specify separately the amounts payable by customers in respect of taxes, airport charges and other charges, surcharges or fees and may not, as a consequence, even partially, include those items in the air fare.