Section 7National Internal Revenue Code of 1997 (Republic Act No. 8424), Sec. 7

Authority of the Commissioner to Delegate Power. - The Commissioner may delegate the powers vested in him under the pertinent provisions of this Code to any or such subordinate officials with the rank equivalent to a division chief or higher, subject to such limitations and restrictions as may be imposed under rules and regulations to be promulgated by the Secretary of finance, upon recommendation of the Commissioner: Provided, However, That the following powers of the Commissioner shall not be delegated:

(a) The power to recommend the promulgation of rules and regulations by the Secretary of Finance;

(b) The power to issue rulings of first impression or to reverse, revoke or modify any existing ruling of the Bureau;

(c) The power to compromise or abate, under Sec. 204 (A) and (B) of this Code, any tax liability: Provided, however, That assessments issued by the regional offices involving basic deficiency taxes of Five hundred thousand pesos (P500,000) or less, and minor criminal violations, as may be determined by rules and regulations to be promulgated by the Secretary of finance, upon recommendation of the Commissioner, discovered by regional and district officials, may be compromised by a regional evaluation board which shall be composed of the Regional Director as Chairman, the Assistant Regional Director, the heads of the Legal, Assessment and Collection Divisions and the Revenue District Officer having jurisdiction over the taxpayer, as members; and

(d) The power to assign or reassign internal revenue officers to establishments where articles subject to excise tax are produced or kept.