Title I — ORGANIZATION AND FUNCTION OF THE BUREAU OF INTERNAL REVENUE complied with, and to aid in the prevention, detection and punishment of frauds or delinquencies in connection therewith. It shall be the duty of every Revenue District Officer to examine the efficiency of all officers and employees of the Bureau of Internal Revenue under his supervision, and to report in writing to the Commissioner, through the Regional Director, any neglect of duty, incompetency, delinquency, or malfeasance in office of any internal revenue officer of which he may obtain knowledge, with a statement of all the facts and any evidence sustaining each case. SEC. 12.  Agents and Deputies for Collection of National Internal Revenue Taxes. — The following are hereby constituted agents of the Commissioner: (a) The Commissioner of Customs and his subordinates with respect to the collection of national internal revenue taxes on imported goods; (b) The head of the appropriate government office and his subordinates with respect to the collection of energy tax; and (c) Banks duly accredited by the Commissioner with respect to receipt of payments of internal revenue taxes authorized to be made thru banks. Any officer or employee of an authorized agent bank assigned to receive internal revenue tax payments and transmit tax returns or documents to the Bureau of Internal Revenue shall be subject to the same sanctions and penalties prescribed in Sections 269 and 270 of this Code. SEC. 13.  Authority of a Revenue Officer. — Subject to the rules and regulations to be prescribed by the Secretary of Finance, upon recommendation of the Commissioner, a Revenue Officer assigned to perform assessment functions in any district may, pursuant to a Letter of Authority issued by the Revenue Regional Director, examine taxpayers within the jurisdiction of the district in order to collect the correct amount of tax, or to recommend the assessment of any deficiency tax due in the same manner that the said acts could have been performed by the Revenue Regional Director himself. SEC. 14.  Authority of Officers to Administer Oaths and Take Testimony. — The Commissioner, Deputy Commissioners, Service Chiefs, Assistant Service Chiefs, Revenue Regional Directors, Assistant Revenue Regional Directors, Chiefs and Assistant Chiefs of Divisions, Revenue District Officers, special deputies of the Commissioner, internal revenue officers and any other employee of the Bureau thereunto especially deputized by the Commissioner shall have the power to administer oaths and to take testimony in any official matter or investigation conducted by them regarding matters within the jurisdiction of the Bureau. 10 Isla Lipana & Co., the Philippine member firm of the PwC network