Section 2. All deposits of whatever nature with banks or banking institutions in the Philippines including investments in bonds issued by the Government of the Philippines, its political subdivisions and its instrumentalities, are hereby considered as of an absolutely confidential nature and may not be examined, inquired or looked into by any person, government official, bureau or office, except when the examination is made in the course of a special or general examination of a bank and is specifically authorized by the Monetary Board after being satisfied that there is reasonable ground to believe that a bank fraud or serious irregularity has been or is being committed and that it is necessary to look into the deposit to establish such fraud or irregularity, or when the examination is made by an independent auditor hired by the bank to conduct its regular audit provided that the examination is for audit purposes only and the results thereof shall be for the exclusive use of the bank, or upon written permission of the depositor, or in cases of impeachment, or upon order of a competent court in cases of bribery or dereliction of duty of public officials, or in cases where the money deposited or invested is the subject matter of the litigation.