How to setup Bank Transfer Authorization

Hi

I found that Bank Transfer can be performed using Authorization, but I can't find any setup to make a specific User as the one who should Authorize bank transfers.

In System parameter there is a check box and in bank transfer form there is a check box, but other than these there is no specific setup.

Suppose, if A performs bank transfers, how can I make B to authorize it.? It would be great if someone help in this ASAP.

Thanks

Sunderraj