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As of 1 January 2017, CX will interline on separate tickets to their airline partners once again.

to 31 Dec 2016 CX Agents' advisory http://www.cxagents.com/cxa/gc/en_HK/ln2
from 1 Jan 2017 http://www.cathaypacific.com/cx/en_H...e-tickets.html

Ausbt article: http://www.ausbt.com.au/cathay-pacif...-baggage-rules
http://www.ausbt.com.au/did-oneworld...of-a-nightmare
http://www.ausbt.com.au/oneworld-air...ecting-flights

AA: will not check through separate PNRs (own or partner) https://ssc.aa.com/prmportal_enu/Age...%20Tickets.pdf
MH: still check through two PNRs (own or partner)
CX/KA: check through CX/KA separate PNRs. Will resume checking through to partners starting 1 Jan 2017 http://www.cathaypacific.com/cx/en_H...e-tickets.html
JL: Will through check. http://www.jal.co.jp/en/info/inter/161003.html
QR: will check through separate PNRs (own or partner) from 01 MAR. https://www.ausbt.com.au/qatar-airways-ditches-oneworld-s-restrictive-baggage-rules
QF: Will check through QF to QF separate PNRs, will not check through partner separate PNRs (from 1 Sep 2016)
BA: Will not check through partner or other airlines' separate PNRs. WIll not check through BA-BA on seperate PNR's (as of 15 Nov 16)
IB: Will check through IB to IB separate PNRs
LA: will not check through separate PNRs (own or partner)
AY: Will check through AY to AY separate PNRs, will not check through partner separate PNRs