13.Obligations as to fidelity and secrecy.-(1) Every corresponding now bank shall observe, except as otherwise required by law, the practices and usages customary among bankers, and in particular, it shall not divulge any information relating to or to the affairs of its constituents except in circumstances in which it is, in accordance with law or practices and usages customary among bankers, necessary or appropriate for the corresponding new bank to divulge such information.(2) Every director, member of a local board or a committee, or auditor, adviser, officer or other employee of a corresponding new bank shall, before entering upon his duties, make a declaration of fidelity and secrecy in the form set out in the Third Schedule.(3) Every Custodian of a corresponding new bank shall, as soon as possible, make a declaration of fidelity and secrecy in the form set out in the Third Schedule.