Originally Posted by
Kiwi Flyer
TC 1, 2 & 3 are IATA areas. 1 is North and South America, 2 is Europe Africa and Middle East, 3 is Asia and South Pacific.
Surprisingly for some (including myself

) TC stands for "Tariff Conference":
- TC1 is North America and South America
- TC2 is Europe, Middle East and Africa
- TC3 is Asia and South West Pacific.
Hard to get at with an online link as IATA sell this information in several ways, including documentation (CD-ROM, Books) and as part of their training packages.
Look on page 10 of this 3Mbyte .PDF:
ACCC DISCUSSION PAPER
3.18 The seven [

] passenger conferences are:
- TC1 (Tariff Conference 1) which has authority for passenger traffic within Area 1 which broadly embraces the North and South American continents;
- TC2 (Tariff Conference 2) which has authority for passenger traffic within Area 2 which broadly embraces Europe, the African continent and part of Asia extending to Iran;
- TC3 (Tariff Conference 3) which has authority for passenger traffic within Area 3 which broadly embraces Asia and Australasia;
- TC12 which has authority for traffic between Areas 1 and 2;
- TC23 which has authority for traffic between Areas 2 and 3;
- TC31 which has authority for traffic between Areas 3 and 1;
- TC123 which has authority for traffic between Area 1 and Area 3 via Area 2.