English to German Bus/Financial Tourism & Travel

aus einem türkischen auf Englisch verfassten Vertrag:

After completion of the first year of service, only for domestic lines flights, the pilot and his children will be eligible for one (1) 100% discounted pass ticket and two (2) 90% discounted pass tickets;

After completion of the second year of service, in addition to the right vested as stated above, one (1) 100% discounted pass ticket for international lines (only for Middle East and Europe);

After completion of the third year of service, in addition to the rights vested as stated above, one (1) 100% discounted pass ticket for domestic lines;

Es geht um ermäßigte Tickets. Was aber sind "pass tickets"

Vielen Dank!