National Internal Revenue Code (NIRC)
Section 270. Unlawful Divulgence of Trade Secrets. - Except as provided in Section 71 of this Code and Section 26 of Republic Act No. 6388, any officer or employee of the Bureau of Internal Revenue who divulges to any person or makes known in any other manner than may be provided by law information regarding the business, income or estate of any taxpayer, the secrets, operation, style or work, or apparatus of any manufacturer or producer, or confidential information regarding the business of any taxpayer, knowledge of which was acquired by him in the discharge of his official duties, shall upon conviction for each act or omission, be punished by a fine of not less than Fifty thousand pesos (P50,000) but not more than One hundred thousand pesos (P100,000), or suffer imprisonment of not less than two (2) years but not more than five (5) years, or both.