OZ can check through to CX...if the agent refuses, be polite and ask a supervisor, although i doubt you'll have any problems. I have seen bags tagged all the way through to HKG on a UA-KE-CX itinerary a few years back- and the reached HKG all right.
[KVS Availability Tool 7.1.6 - Reference: Interline Agreements [IET]: OZ]
Code:
ELECTRONIC INTERLINE CARRIER AGREEMENTS-OZ
INTERLINE CARRIER CODES
AA - AC - AE - AF - AH - AI - AM - AP - AS - AT
AV - AY - AZ - A3 - BA - BD - BG - BR - BX - B6
B7 - CA - CI - CM - CX - CZ - DL - EK - ET - EY
FI - FJ - FM - FV - F9 - GA - GF - HA - HR - HU
HY - HZ - IB - IE - JJ - JL - JP - KA - KC - KE
KL - KM - KQ - KU - LA - LG - LH - LO - LP - LR
LX - LY - MD - ME - MF - MH - MI - MS - MU - NH
NX - NZ - OA - OM - OS - OU - PG - PK - PR - PX
PZ - QF - QR - QV - RA - RJ - SA - SB - SC - SK
SN - SQ - SU - SV - S7 - TA - TG - TK - TN - TP
TU - UA - UL - UN - US - VN - VR - VS - VX - WF
WY - XF - YO - ZH - 8M - 9B - 9W