Confidentiality of bank tax records barred, with limited statutory exceptions permitting disclosure for prosecutions and official tax functions. The notification directs that no public servant shall disclose or produce information or documents supplied under the Income-tax Act relating to assessees that are banking companies, subject to specified exceptions permitting disclosure for prosecutions, tax administration, lawful service or recovery processes, exchange of information for double taxation relief, central audit functions, and specified inquiries and disciplinary or prosecutorial processes.