BobBob21
Prominent Member
You normally tell the new employer that you give them permission to seek references, I've personally never been told what questions will be asked in those references.I really don't get what you are asking, if I don't give my old employer permission to divulge anything except my position and length of service and they do, I would assume that is a data breach.
Similarly I've never directly told any former employer that I give permission for them to give any form of reference let alone which questions they can and cannot answer.
The norm is you permission the new employer with a blank cheque and they take it to your old one and ask what they want.