12.1 Reservation and purchase of additional services: Additional services are not included per default in all tariff offers. Extra charges may apply to additional services. The terms and conditions of additional services are subject to change and charges may vary depending on the time and the channel of purchase.
12.2 If we make arrangements for you with a third party to provide any services other than carriage by air, or if we issue a ticket or voucher relating to transportation or services (other than carriage by air) provided by a third party such as hotel reservations or car rentals, we will be acting solely as an agent for this third party in doing so, and their own terms and conditions will apply.
12.3 If we are also providing surface transportation to you, other regulations may apply to such surface transportation. Such regulations are available from us upon request.