Why can you only fly AA codeshares if originating/terminating in the USA? The only codeshare reference I could find in the rules is:

47N APPLICATION
48N ------------
49N .
50N . 1. APPLIES TO FIRST CLASS, BUSINESS CLASS AND
51N . ECONOMY CLASS, RTW TRAVEL VIA
52N . .
53N . AA BA IB LP
54N . LA ¥
55N . . ¥
56N . AY CX EI
57N . QF
58N . .
59N . .
60N . .
61N . 2. TRAVEL ON CODESHARES OPERATED BY THE CARRIERS
62N . LISTED ABOVE IS PERMITTED. OTHER CODESHARE
63N . SERVICES NOT PERMITTED.
64N . EXCEPTION 1: FOR TICKETS ISSUED ON/AFTER
65N . 01JUL05, TRAVEL NOT PERMITTED ON CX BETWEEN HONG
66N . KONG AND HANOI.
67N . EXCEPTION 2: QF CODESHARE SERVICES OPERATED BY
68N . JQ/JETSTAR ARE PERMITTED EXCEPT FOR POINT OF SALE
69N . AUSTRALIA AND NEW ZEALAND.

That states nothing about codeshares validity with specific originating/terminating points, so is there something else i'm missing?