Most significant marketing carrier (MSC)
If your journey involves a Qatar Airways codeshare flight or a flight operated by another airline, the International Air Transport Association's (IATA) Most Significant Marketing Carrier (MSC) rule will determine your baggage allowance.
IATA divides the world into areas as such:
| IATA Area | Sub Area |
| North America, Central and South America, Hawaii | USA, Canada, Mexico |
| Caribbean | |
| Central America | |
| South America | |
| Europe, Middle East | Europe |
| Middle East | |
| Africa | |
| Asia, Guam, Southwest Pacific | Japan, Korea |
| Southeast Asia | |
| South Asian Subcontinent | |
| Southwest Pacific |
The Most Significant Marketing Carrier (MSC) is:
.For travel between IATA areas: The first carrier flying in between two of the IATA areas
.For travel between IATA sub areas: The first carrier flying in between the sub areas
.For travel within an IATA sub area: The first carrier crossing an international border
There may be other exceptions. Please check with your nearest Qatar Airways office before booking.