From the Visit Asia rules sheet: http://www.oneworld.com/tasks/downlo...objectID=13072

Sales
Valid only for sale outside Asia and can only be sold in conjunction with intercontinental travel to/via Asia prior to departure from the country of origin Only ONE Visit Asia ticket can be issued per each international trip and must be cross-referenced to the international ticket.

For the purposes of this fare the definition of Asia is as follows:
Bangladesh Cambodia China Guam Hong Kong India Indonesia
Japan Korea Malaysia Nepal Pakistan Philippines Singapore
Sri Lanka Taiwan Thailand Vietnam

Eligibility
1. Only available to overseas originating passengers in conjunction with travel on a oneworld carrier (AA/AY/BA/CX /IB/JC/JL/ KA/LA/MA/MX/NU/QF/RJ/ XL/4M) to/via Asia.
2. Only available to non-residents of Asia. Proof of residence may be required at time of purchase or at check-in.

Reservations
The booking class on all sectors is M class

Ticketing
Tickets for the entire journey must be purchased/issued in the country of origin of intercontinental travel, and prior to departure. A separate ticket must be issued and cross referenced to the intercontinental ticket
Tickets must be issued on the stock of AA/AY/BA/CX/IB/JL/KA/LA/LP/MA/MX/QF/RJ/XL/4M