a. Assess and collect all taxes, fees and charges and account for all revenues collected;

b. Exercise duly delegated powers for the proper performance of its functions and duties;

c. Formulate preventive measures for tax evasion and all other illegal economic activities;

d. Exercise immediate supervision over its field units; and e. Perform such other functions as may be assigned by the Minister or the Cabinet through the Minister of Finance, and Budget and Management.