T&C for lounge access differs from one world to AB for example
 

When I look at AB T&C for lounge access (as platinum) I see that they say you need "a airberlin or one world boarding pass", on the other hand one world say "flight marketed and operated by a one world carrier".
So let's say I am in HKG or ICN and I want to access the Cathay First Lounge, I have an AB boarding pass and the flight has an AB number but it's obviously operated by Ethiad, will I be able to access? For AB T&C yes, for one world no...which one will apply? (I'm afraid it's gonna be ow xD)

T&C for lounge access differs from one world to AB for example
 

It needs to be OW operated.

Not only that but the boarding pass will show the EY flight number not the codeshare.